edje_edit: add null check for return of eina_hash_find

Summary: to prevent null pointer dereference

Test Plan: N/A

Reviewers: cedric, jsuya

Reviewed By: jsuya

Subscribers: #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D12094

src/lib/edje/edje_edit.c

@@ -6292,6 +6292,7 @@ _edje_edit_state_alloc(int type, Edje *ed)
    Edje_Part_Description_Common *pd = NULL;
 
    ce = eina_hash_find(ed->file->collection, ed->group);
+   if (!ce) return NULL;
 
    switch (type)
      {