clear is-HGR-title-packed marker just before loading

fixes https://github.com/a2-4am/4cade/issues/548

src/index/artwork.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15432724
+         !be24  15432772
          !le16     5112

src/index/attract.idx.a

@@ -5,4 +5,4 @@
 ;
          !byte 0
          !be24  15378115
-         !le16     5695
+         !le16     5743

src/index/coverfade.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15437836
+         !be24  15437884
          !le16      410

src/index/credits.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15438590
+         !be24  15438638
          !le16      448

src/index/decrunch.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15439038
+         !be24  15439086
          !le16      303

src/index/dfx.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15386450
+         !be24  15386498
          !le16     1640

src/index/dgr.fizzle.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15438322
+         !be24  15438370
          !le16       67

src/index/dgr.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15432665
+         !be24  15432713
          !le16       59

src/index/dhgr.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15431121
+         !be24  15431169
          !le16     1426

src/index/dtitle.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15415355
+         !be24  15415403
          !le16      540

src/index/fx.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15383810
+         !be24  15383858
          !le16     2640

src/index/gamehelp.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15388448
+         !be24  15388496
          !le16     7329

src/index/gr.fizzle.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15438246
+         !be24  15438294
          !le16       76

src/index/gr.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15432547
+         !be24  15432595
          !le16      118

src/index/helptext.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15438389
+         !be24  15438437
          !le16      201

src/index/hgr0.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15415895
+         !be24  15415943
          !le16     4897

src/index/hgr1.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15420792
+         !be24  15420840
          !le16     1775

src/index/hgr2.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15422567
+         !be24  15422615
          !le16     1181

src/index/hgr3.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15423748
+         !be24  15423796
          !le16     3421

src/index/hgr4.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15427169
+         !be24  15427217
          !le16     3359

src/index/hgr5.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15430528
+         !be24  15430576
          !le16      479

src/index/hgr6.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15431007
+         !be24  15431055
          !le16      114

src/index/joystick.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15439341
+         !be24  15439389
          !le16     2370

src/index/miniattract0.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15401151
+         !be24  15401199
          !le16     4933

src/index/miniattract1.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15406084
+         !be24  15406132
          !le16     2400

src/index/sfx.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15388090
+         !be24  15388138
          !le16      358

src/index/slideshow.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15395777
+         !be24  15395825
          !le16     5374

src/index/title.idx.a

@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15408484
+         !be24  15408532
          !le16     6871

src/ui.attract.hgr.a

@@ -123,14 +123,15 @@ HGRTitleCallback
 @fname   !word $FDFD                 ; SMC
          +ST16 @indexRecordPtr
 
+         lda   #$00
+         sta   $5FFD
+
          jsr   LoadIndexedFile       ; load HGR graphic at $4000
          !word $4000
 @indexRecordPtr
          !word $FDFD                 ; SMC
 
          lda   $5FFD
-         stx   $5FFD                 ; ensure that we won't find it again if next
-                                     ; file is really compressed
          cmp   #$4C                  ; Check if screen hole now contains a JMP
          beq   @noUnpack             ; if so, file was not packed, so skip unpack
          jsr   UnpackHGRTitle