(svn r26103) -Fix: prevent odd overflows due to integer promotion

src/blitter/32bpp_simple.cpp

@@ -95,7 +95,7 @@ void Blitter_32bppSimple::DrawColourMappingRect(void *dst, int width, int height
 Sprite *Blitter_32bppSimple::Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator)
 {
 	Blitter_32bppSimple::Pixel *dst;
-	Sprite *dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width * sizeof(*dst));
+	Sprite *dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + (size_t)sprite->height * (size_t)sprite->width * sizeof(*dst));
 
 	dest_sprite->height = sprite->height;
 	dest_sprite->width  = sprite->width;

src/blitter/8bpp_simple.cpp

@@ -58,7 +58,7 @@ void Blitter_8bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, Zoom
 Sprite *Blitter_8bppSimple::Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator)
 {
 	Sprite *dest_sprite;
-	dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width);
+	dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + (size_t)sprite->height * (size_t)sprite->width);
 
 	dest_sprite->height = sprite->height;
 	dest_sprite->width  = sprite->width;