flush stdout after writing % complete instead of waiting for line buffering

git-svn-id: svn://anubis/fart/trunk@266 7f9b0f55-74a9-4bce-be96-3c2cd072584d

main/fart.cc

@@ -273,6 +273,7 @@ int main(int argc, char * argv[])
                 {
                     double pct = 100.0 * pixel_num / (double) total_pixels;
                     printf("\e[8D%2.1f%%", pct);
+                    fflush(stdout);
                 }
             }
         }