[gtk+] Win32 : fixes Bug 679019 (Popup menu misplaced in dual monitor)

[Manuel Bachmann <mbachmann src gnome org>]

commit 55dba74a24789b417f2feb80daf5e57627298f7e
Author: Manuel Bachmann <tarnyko tarnyko net>
Date:   Fri Nov 1 17:59:05 2013 +0100

    Win32 : fixes Bug 679019 (Popup menu misplaced in dual monitor)

 gdk/win32/gdkdevice-win32.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gdk/win32/gdkdevice-win32.c b/gdk/win32/gdkdevice-win32.c
index 53a5daf..0039e4b 100644
--- a/gdk/win32/gdkdevice-win32.c
+++ b/gdk/win32/gdkdevice-win32.c
@@ -207,6 +207,12 @@ gdk_device_win32_query_state (GdkDevice        *device,
 
       if (win_y)
         *win_y += _gdk_offset_y;
+      
+      if (root_x)
+        *root_x += _gdk_offset_x;
+
+      if (root_y)
+        *root_y += _gdk_offset_y;
     }
 
   if (child_window)