avfilter/vf_amplify: cosmetics

libavfilter/vf_amplify.c

@@ -231,7 +231,7 @@ static av_cold void uninit(AVFilterContext *ctx)
 
     if (s->frames) {
         for (i = 0; i < s->nb_frames; i++)
-           av_frame_free(&s->frames[i]);
+            av_frame_free(&s->frames[i]);
     }
     av_freep(&s->frames);
 }