Adjust the buffer size keeping in mind that the screen size may have

been adjusted by the gcd calculation. This fix the problem with the
256x246 resolutions adjusted to 256x24 by the gcd.

src/sdl-dingux/sdl_video.cpp

@@ -1958,10 +1958,6 @@ int VideoInit()
 			VideoBufferWidth  = gcd(VideoBufferWidth, modes[0]->w);
 			VideoBufferHeight = gcd(VideoBufferHeight, modes[0]->h);		    
 		    }
-
-		    /* TODO: Kung fu Master This must be valid but for now it fails in OD Beta 20210809 */
-		    if (VideoBufferWidth == 256 && VideoBufferHeight == 240)
-			VideoBufferHeight = 256;
 
 		    if (hwscale == 1) //Aspect
 			setenv("SDL_VIDEO_KMSDRM_SCALING_MODE", "1", 1);
@@ -2023,9 +2019,22 @@ int VideoInit()
 	nBurnPitch = VideoBufferWidth * 2;
 
 	PhysicalBufferWidth = screen->w;
+#ifdef DEVICE_GCW0
+	/* If resolution adjusted by gcd for hardware scaling is lesser than original */
+	/* then  adjust the buffer size */
+	if (hwscale > 0) {
+	    int bVideoBufferWidth, bVideoBufferHeight;
+	    BurnDrvGetFullSize(&bVideoBufferWidth, &bVideoBufferHeight);
+	    if (bVideoBufferWidth < VideoBufferWidth) bVideoBufferWidth = VideoBufferWidth;
+	    if (bVideoBufferHeight < VideoBufferHeight) bVideoBufferHeight = VideoBufferHeight;
+	    BurnVideoBuffer = (unsigned short *)malloc(bVideoBufferWidth * bVideoBufferHeight * 2);
+	    memset(BurnVideoBuffer, 0, bVideoBufferWidth * bVideoBufferHeight * 2);
+	} else {
+#endif
 	BurnVideoBuffer = (unsigned short *)malloc(VideoBufferWidth * VideoBufferHeight * 2);
 	memset(BurnVideoBuffer, 0, VideoBufferWidth * VideoBufferHeight * 2);
 #ifdef DEVICE_GCW0
+	}
 #endif
 
 #ifdef DEVICE_GCW0