Merge pull request #6835 from Dwedit/null-fix_

Fix a calloc(0) which led to uninitialized data being used later on.

tasks/task_content.c

@@ -796,8 +796,9 @@ static bool content_file_init(
          !content_file_init_set_attribs(content, special, content_ctx, error_string))
       return false;
 
-   info                   = (struct retro_game_info*)
-      calloc(content->size, sizeof(*info));
+   if (content->size > 0)
+      info                   = (struct retro_game_info*)
+         calloc(content->size, sizeof(*info));
 
    if (info)
    {