gengrid: adding sizing eval when gengrid min size is changed

Adding sizing eval when gengrid min width and height is changed,
so need to re-evaluate properly.

Signed-off-by: SangHyeon Lee <sh10233.lee@samsung.com>

src/lib/elementary/elm_gengrid.c

@@ -636,6 +636,7 @@ _calc_job(void *data)
           {
              sd->minh = minh;
              sd->minw = minw;
+             elm_layout_sizing_eval(sd->obj);
              efl_event_callback_legacy_call
                    (sd->pan_obj, ELM_PAN_EVENT_CHANGED, NULL);
           }