edje text: add a missing return macro

Summary:
RETURN_* macro does unref before exiting functions.
Must be called after using PROXY_DATA_GET macro.
@fix

Test Plan:
1. Run terminology
2. Open Setting
3. Check error messages when you change something from Setting.

Reviewers: herdsman, raster

Subscribers: cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D4956

src/lib/edje/edje_part_text.c

@@ -12,6 +12,7 @@ _efl_canvas_layout_internal_text_efl_text_text_set(Eo *obj,
 {
    PROXY_DATA_GET(obj, pd);
    _edje_efl_text_set(obj, pd->ed, pd->part, text);
+   RETURN_VOID;
 }
 
 EOLIAN static const char *