Prevent a null dereference in ff_psy_preprocess_end()
--Alex
diff --git a/libavcodec/psymodel.c b/libavcodec/psymodel.c
index a04cc39..be9012c 100644
--- a/libavcodec/psymodel.c
+++ b/libavcodec/psymodel.c
@@ -122,6 +122,7 @@ av_cold void ff_psy_preprocess_end(struct FFPsyPreprocessContext *ctx)
{
int i;
ff_iir_filter_free_coeffs(ctx->fcoeffs);
+ if (ctx->fstate)
for(i = 0; i < ctx->avctx->channels; i++){
ff_iir_filter_free_state(ctx->fstate[i]);
}
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