Allow percent=0

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@35538 15284696-431f-4ddb-bdfa-cd5b030d7da7

visualization/ximgview/main.c

@@ -169,7 +169,8 @@ static void main_loop(void)
 	    }
 	}
 
-	delay = (unsigned long)(last / fraction);
+	if (fraction > 0.001)
+	    delay = (unsigned long)(last / fraction);
 
 	tv.tv_sec = delay / 1000000;
 	tv.tv_usec = delay % 1000000;