lavfi/hue: set to NULL freed pointers

Possibly safer.
13 years ago · 3aa1b53256
parent 31aa5b1a78
commit 3aa1b53256
1 changed files with 2 additions and 1 deletions
--- a/libavfilter/vf_hue.c
+++ b/libavfilter/vf_hue.c
@ -118,8 +118,9 @@ static inline void compute_sin_and_cos(HueContext *hue)
            hue->attr##_pexpr = old_##attr##_pexpr;                               \
            return AVERROR(EINVAL);                                               \
        } else if (old_##attr##_pexpr) {                                          \
-            av_free(old_##attr##_expr);                                           \
+            av_freep(&old_##attr##_expr);                                         \
            av_expr_free(old_##attr##_pexpr);                                     \
+            old_##attr##_pexpr = NULL;                                            \
        }                                                                         \
    } while (0)