--- /home/drmccoy/B/libsdl1.2-1.2.15/src/video/x11/SDL_x11video.c	2013-07-19 23:39:15.000000000 +0200
+++ /home/drmccoy/A/libsdl1.2-1.2.15/src/video/x11/SDL_x11video.c	2013-07-19 23:29:23.000000000 +0200
@@ -1474,7 +1474,10 @@
 		xcmap[i].blue  = ramp[2*256+c];
 		xcmap[i].flags = (DoRed|DoGreen|DoBlue);
 	}
-	XStoreColors(GFX_Display, SDL_XColorMap, xcmap, ncolors);
+	if ( XStoreColors(GFX_Display, SDL_XColorMap, xcmap, ncolors) != 0 ) {
+		SDL_SetError("Setting gamma correction failed");
+		return(-1);
+	}
 	XSync(GFX_Display, False);
 	return(0);
 }