Fix remote framebuffer test.

src/conio/sdlfuncs.c

@@ -588,7 +588,7 @@ int SDL_main_env(int argc, char **argv, char **env)
 		 * This ugly hack attempts to prevent this... of course, remote X11
 		 * connections must still be allowed.
 		 */
-		if((!use_sdl_video) || getenv("REMOTEHOST")!=NULL && getenv("DISPLAY")==NULL) {
+		if((!use_sdl_video) || (getenv("REMOTEHOST")!=NULL && getenv("DISPLAY")==NULL)) {
 			/* Sure ,we can't use video, but audio is still valid! */
 			if(sdl.Init(0)==0)
 				sdl_initialized=TRUE;