[mutter] display: don't interrupt grab move/resize without modifiers

[Lionel Landwerlin <llandwerlin src gnome org>]

commit 0e3aab8691c240996c773e14bfbe9ce6fdf2303f
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Tue Jul 23 17:48:16 2013 +0100

    display: don't interrupt grab move/resize without modifiers
    
    The part of code dealing with move/resize grab in display.c is only
    responsible of this behavior when triggered with a modifier. So it
    shouldn't stop the move/resize behavior triggered from a mouse event
    without modifier on the title bar or sides of the window.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=704759

 src/core/display.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/core/display.c b/src/core/display.c
index 10da8d9..722fddd 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -2349,6 +2349,7 @@ event_callback (XEvent   *event,
 
           if ((window &&
                meta_grab_op_is_mouse (display->grab_op) &&
+               (device_event->mods.effective & display->window_grab_modifiers) &&
                display->grab_button != device_event->detail &&
                display->grab_window == window) ||
               grab_op_is_keyboard (display->grab_op))