avfilter/vaf_spectrumsynth: Move "break" up

Fixes CID1351347

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavfilter/vaf_spectrumsynth.c

@@ -442,11 +442,11 @@ static int try_push_frames(AVFilterContext *ctx)
     case SCROLL:
         s->xpos = s->xend - 1;
         ret = try_push_frame(ctx, s->xpos);
+        break;
     case RSCROLL:
         s->xpos = 0;
         ret = try_push_frame(ctx, s->xpos);
         break;
-        break;
     case FULLFRAME:
         for (x = 0; x < s->xend; x++) {
             ret = try_push_frame(ctx, x);