[metacity] xrender: fix window resizing

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 6f559517596aa87236140c9669f1ec43d94484f9
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Mar 18 12:27:30 2017 +0200

    xrender: fix window resizing

 src/compositor/meta-compositor-xrender.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)
---
diff --git a/src/compositor/meta-compositor-xrender.c b/src/compositor/meta-compositor-xrender.c
index 8c80e5b..b7fb9e9 100644
--- a/src/compositor/meta-compositor-xrender.c
+++ b/src/compositor/meta-compositor-xrender.c
@@ -734,9 +734,16 @@ find_comp_window_by_xwindow (MetaCompositorXRender *xrender,
 
       frame = meta_window_get_frame (cw->window);
 
-      if ((frame && meta_frame_get_xwindow (frame) == xwindow) ||
-          meta_window_get_xwindow (cw->window) == xwindow)
-        return cw;
+      if (frame)
+        {
+          if (meta_frame_get_xwindow (frame) == xwindow)
+            return cw;
+        }
+      else
+        {
+          if (meta_window_get_xwindow (cw->window) == xwindow)
+            return cw;
+        }
     }
 
   return NULL;