[gtk+] gdkwindow: Fix potential uses of uninitialised variables

[Philip Withnall <pwithnall src gnome org>]

commit 86b617094067f90236d67b099a68f7b8f54667ce
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Nov 20 17:20:33 2013 +0000

    gdkwindow: Fix potential uses of uninitialised variables
    
    Found with scan-build.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=712760

 gdk/gdkwindow.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index f6330e2..63bc225 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -2825,7 +2825,7 @@ gdk_window_end_paint (GdkWindow *window)
   GdkWindow *composited;
   GdkWindowPaint *paint;
   GdkWindowImplClass *impl_class;
-  GdkRectangle clip_box;
+  GdkRectangle clip_box = { 0, };
   cairo_region_t *full_clip;
   cairo_t *cr;
 
@@ -8258,6 +8258,10 @@ get_event_window (GdkDisplay                 *display,
   touch_grab = _gdk_display_has_touch_grab (display, device, sequence, serial);
   grab = _gdk_display_get_last_device_grab (display, device);
 
+  /* Default value. */
+  if (evmask_out)
+    *evmask_out = 0;
+
   if (is_touch_type (type) && pointer_emulated)
     {
       switch (type)