avfilter/vf_convolve: reset fft/ifft pointers after free

diff --git a/libavfilter/vf_convolve.c b/libavfilter/vf_convolve.c
index 024eb684867b4358914b74468473939c19ce6e59..90ec98715bacbc2921301828431e4b552bba0ab4 100644 (file)
--- a/libavfilter/vf_convolve.c
+++ b/libavfilter/vf_convolve.c
@@ -590,7 +590,9 @@ static av_cold void uninit(AVFilterContext *ctx)
 
         for (j = 0; j < MAX_THREADS; j++) {
             av_fft_end(s->fft[i][j]);
+            s->fft[i][j] = NULL;
             av_fft_end(s->ifft[i][j]);
+            s->ifft[i][j] = NULL;
         }
     }