edje: optimize color_class_recursive_find_helper() function

Summary:
If the  color_class is not overridden by the object level the
hash will be empty but still we do the expensive call to _edje_hash_find_helper()
find the color_class in an empty hash. by checking if the hash is empty
and returning early we save lot of unnecessary hash computaion and lookup.

Reviewers: Hermet

Reviewed By: Hermet

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D9532

src/lib/edje/edje_util.c

@@ -5722,6 +5722,8 @@ _edje_color_class_recursive_find_helper(const Edje *ed, Eina_Hash *hash, const c
    Edje_Color_Tree_Node *ctn = NULL;
    const char *parent;
 
+   if (!eina_hash_population(hash)) return NULL;
+
    cc = _edje_hash_find_helper(hash, color_class);
    if (cc) return cc;
    else if (ed->file)