remove usless if() before av_free()

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@8266 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

ffmpeg.c

@@ -3808,9 +3808,7 @@ int main(int argc, char **argv)
 
     av_free_static();
 
-    if(intra_matrix)
         av_free(intra_matrix);
-    if(inter_matrix)
         av_free(inter_matrix);
 
 #ifdef CONFIG_POWERPC_PERF