lavf/sr: Don't need to check NULL before sws_freeContext

sws_freeContext have check the NULL pointer, so don't need to check
NULL before sws_freeContext.

Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

diff --git a/libavfilter/vf_sr.c b/libavfilter/vf_sr.c
index a371e443d449eff7c4342714a2a20f856eebd333..0be572ff9d1d01ed03669c14aad086d9b8dc2ab1 100644 (file)
--- a/libavfilter/vf_sr.c
+++ b/libavfilter/vf_sr.c
@@ -286,9 +286,7 @@ static av_cold void uninit(AVFilterContext *context)
     }
 
     for (i = 0; i < 3; ++i){
-        if (sr_context->sws_contexts[i]){
-            sws_freeContext(sr_context->sws_contexts[i]);
-        }
+        sws_freeContext(sr_context->sws_contexts[i]);
     }
 }