avdevice/timefilter: cleanup the formating of the test output

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavdevice/timefilter.c

@@ -150,7 +150,7 @@ int main(void)
             }
             ff_timefilter_destroy(tf);
 #else
-            printf(" [%f %f %9f]", bestpar0, bestpar1, best_error);
+            printf(" [%11f %11f %9f]", bestpar0, bestpar1, best_error);
 #endif
         }
         printf("\n");