rel1.to: ""; fix build error.

Actually, if rel1.to_x is not used in the matched description of the parent group, rel1.to_x: ""; doesn't need to be used in the description of the child group.
Because its state is already default. But sometime we may want to use it explicitly. So I add this code in order to cover that case.


SVN revision: 65160

legacy/edje/src/bin/edje_cc_out.c

@@ -1401,6 +1401,7 @@ data_queue_part_lookup(Edje_Part_Collection *pc, const char *name, int *dest)
              return;
           }
      }
+   if (!name[0]) return;
 
    pl = mem_alloc(SZ(Part_Lookup));
    part_lookups = eina_list_append(part_lookups, pl);