Remove the "Tag" field in struct Bitmap since it is of no real use.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5565 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/sp65/bitmap.c

@@ -66,7 +66,6 @@ Bitmap* NewBitmap (unsigned Width, unsigned Height)
     /* Initialize the data */
     B->Type     = bmUnknown;
     B->Name     = EmptyStrBuf;
-    B->Tag      = 0;
     B->Width    = Width;
     B->Height   = Height;
     B->Pal      = 0;
@@ -80,8 +79,7 @@ Bitmap* NewBitmap (unsigned Width, unsigned Height)
 void FreeBitmap (Bitmap* B)
 /* Free a dynamically allocated bitmap */
 {
-    /* Free the format specific data, the palette and then the bitmap */
-    xfree (B->Tag);
+    /* Free the palette and then the bitmap */
     xfree (B->Pal);
     xfree(B);
 }