Merge remote-tracking branch 'qatar/master'

* qatar/master:
  mem: Make av_strdup allocate using av_realloc

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/mem.c

@@ -258,7 +258,7 @@ char *av_strdup(const char *s)
     char *ptr = NULL;
     if (s) {
         int len = strlen(s) + 1;
-        ptr = av_malloc(len);
+        ptr = av_realloc(NULL, len);
         if (ptr)
             memcpy(ptr, s, len);
     }