avfilter/avf_showfreqs: assert that variables are initialized by switch()

Silences: CID1351396

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

diff --git a/libavfilter/avf_showfreqs.c b/libavfilter/avf_showfreqs.c
index af6e4c2a53a79b48e549abb9ac7ad75bf6ecaa91..b33587b318190b39ee20197f9a7868946a4e1166 100644 (file)
--- a/libavfilter/avf_showfreqs.c
+++ b/libavfilter/avf_showfreqs.c
@@ -310,6 +310,8 @@ static inline void plot_freq(ShowFreqsContext *s, int ch,
         end = (outlink->h / s->nb_channels) * (ch + 1);
         y = (outlink->h / s->nb_channels) * ch + a * (outlink->h / s->nb_channels) - 1;
         break;
+    default:
+        av_assert0(0);
     }
     if (y < 0)
         return;