Fix 64-bit math error

32-bit * 32-bit = 32-bit, so disk images with partitions whose size
exceeded the capacity of a 32-bit int were coming out wrong.

Updated version to 4.0.3-a1.

DIST/with-mdc.deploy

@@ -4,8 +4,8 @@ faddenSoft
 http://www.faddensoft.com/
 CiderPress
 http://a2ciderpress.com/
-4.0.2
-43000
+4.0.3-a1
+43038
 C:\DATA\faddenSoft\fs.ico
 Copyright © 2017 CiderPress project authors.  All rights reserved.
 C:\Src\CiderPress\DIST\ReadMe.txt
@@ -357,7 +357,7 @@ FALSE
 4095
 
 
-Setup402.exe
+Setup403-a1.exe
 
 FALSE
 

app/MyApp.h

@@ -14,8 +14,8 @@
 /* CiderPress version numbers */
 #define kAppMajorVersion    4
 #define kAppMinorVersion    0
-#define kAppBugVersion      2
-#define kAppDevString       L""
+#define kAppBugVersion      3
+#define kAppDevString       L"-a1"
 
 /*
  * Windows application object.

diskimg/DiskImg.cpp

@@ -472,7 +472,7 @@ DIError DiskImg::OpenImage(DiskImg* pParent, long firstBlock, long numBlocks)
      * already have an open file with specific characteristics.
      */
     //fOffset = pParent->fOffset + kBlockSize * firstBlock;
-    fLength = numBlocks * kBlockSize;
+    fLength = (di_off_t)numBlocks * kBlockSize;
     fOuterLength = fWrappedLength = fLength;
     fFileFormat = kFileFormatUnadorned;
     fPhysical = pParent->fPhysical;

diskimg/DiskImg.h

@@ -45,7 +45,7 @@ namespace DiskImgLib {
 /* compiled-against versions; call DiskImg::GetVersion for linked-against */
 #define kDiskImgVersionMajor    5
 #define kDiskImgVersionMinor    0
-#define kDiskImgVersionBug      0
+#define kDiskImgVersionBug      1
 
 
 /*