ecore_evas: Make sure a manual render does a manual render

Summary:
If we call ecore_evas_manual_render() during an async render, it does
nothing.

This is harmful if we've added render post callbacks during that async
render and expect them to fire.

Force a sync and another render if we're in an async render.

ref T7156
Depends on D6714

Reviewers: zmike

Reviewed By: zmike

Subscribers: cedric, #committers, zmike

Tags: #efl

Maniphest Tasks: T7156

Differential Revision: https://phab.enlightenment.org/D6715

src/lib/ecore_evas/ecore_evas.c

@@ -2649,6 +2649,15 @@ ecore_evas_manual_render(Ecore_Evas *ee)
 
         ecore_evas_animator_tick(ee, NULL, t);
      }
+   else
+     {
+        /* We want to ensure a manual render actually takes place,
+         * even if we were in the middle of an async render.  This
+         * will ensure that any post render callbacks added
+         * specifically for this manual render will fire.
+         */
+        ecore_evas_render_wait(ee);
+     }
 
    if (ee->engine.func->fn_render)
      {