win: Don't call ecore_x_screensaver APIs if elm win doesn't have X11 window

Summary:
Elementary application crashes on startup when it is running with
wayland engine. This crash problem happens while ecore_x_screensaver API
is being called from _win_noblank_eval funcion. Thus we should not call
ecore_x_screensaver APIs if elm win doesn't have X11 window.

Test Plan:
1. build efl and elementary to support x11 and also wayland
1. run weston without xwayland
2. run elementary_test on the weston

Reviewers: raster, seoz, stefan_schmidt, devilhorns

Differential Revision: https://phab.enlightenment.org/D1293

diff --git a/src/lib/elm_win.c b/src/lib/elm_win.c
index 68f5365..2ffef69 100644 (file)
--- a/src/lib/elm_win.c
+++ b/src/lib/elm_win.c
@@ -319,6 +319,7 @@ _win_noblank_eval(void)
    Eina_List *l;
    Evas_Object *obj;
    int noblanks = 0;
+   Eina_Bool change = EINA_FALSE;
 
 #ifdef HAVE_ELEMENTARY_X
    EINA_LIST_FOREACH(_elm_win_list, l, obj)
@@ -329,10 +330,14 @@ _win_noblank_eval(void)
           {
              if ((sd->noblank) && (!sd->iconified) && (!sd->withdrawn) &&
                  evas_object_visible_get(obj))
-             noblanks++;
+               noblanks++;
+
+             change = EINA_TRUE;
           }
      }
 
+   if (!change) return;
+
    if (ENGINE_COMPARE(ELM_SOFTWARE_X11) || 
        ENGINE_COMPARE(ELM_SOFTWARE_16_X11) || 
        ENGINE_COMPARE(ELM_XRENDER_X11) || ENGINE_COMPARE(ELM_OPENGL_X11) ||