--- SheepShaver/src/gfxaccel.cpp	2005/01/30 21:48:19	1.3
+++ SheepShaver/src/gfxaccel.cpp	2006/05/07 10:49:48	1.4
@@ -378,9 +378,9 @@ bool NQD_bitblt_hook(uint32 p)
 		ReadMacInt32(p + 0x130) == 0 &&
 		ReadMacInt32(p + acclSrcPixelSize) >= 8 &&
 		ReadMacInt32(p + acclSrcPixelSize) == ReadMacInt32(p + acclDestPixelSize) &&
-		(ReadMacInt32(p + acclSrcRowBytes) ^ ReadMacInt32(p + acclDestRowBytes)) >= 0 && // same sign?
-		ReadMacInt32(p + acclTransferMode) == 0 &&										 // srcCopy?
-		ReadMacInt32(p + 0x15c) > 0) {
+		(int32)(ReadMacInt32(p + acclSrcRowBytes) ^ ReadMacInt32(p + acclDestRowBytes)) >= 0 &&	// same sign?
+		ReadMacInt32(p + acclTransferMode) == 0 &&												// srcCopy?
+		(int32)ReadMacInt32(p + 0x15c) > 0) {
 
 		// Yes, set function pointer
 		WriteMacInt32(p + acclDrawProc, NativeTVECT(NATIVE_BITBLT));