pad Willy Byte to avoid partial copy

src/prelaunch/willy.byte.a

@@ -29,12 +29,12 @@ not_iic1
          sta   patch_iic + 1
 
 not_iic2
-         +READ_ROM_NO_WRITE
          ldx   #(accel_e - accel)
 -        lda   accel, x
          sta   callback1, x
          dex
          bpl   -
+         +READ_ROM_NO_WRITE
          lda   #<callback1
          sta   $414A
          lda   #>callback1

src/prelaunch/willy.byte.mb.a

@@ -349,6 +349,4 @@ callback4
 }
 accel_e
 
-!if * > $D3FF {
-  !error "code is too large, ends at ", *
-}
+!fill $d400-*