[epiphany] window: Fix key event state comparisons

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 7ba5e64a4c3df76b14b7dbb529ebd6645af999ef
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Nov 22 18:38:01 2016 -0600

    window: Fix key event state comparisons
    
    GDK can set random bits in the state to indicate internal stuff. We have
    to use GDK_MODIFIER_MASK to mask out its reserved values before trying
    to look at the state.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772437

 src/ephy-window.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/ephy-window.c b/src/ephy-window.c
index 9db23d3..6f0989c 100644
--- a/src/ephy-window.c
+++ b/src/ephy-window.c
@@ -534,7 +534,7 @@ ephy_window_unfullscreen (EphyWindow *window)
 static gboolean
 should_web_view_receive_key_press_event (GdkEventKey *event)
 {
-  if (event->state == GDK_CONTROL_MASK)
+  if ((event->state & GDK_MODIFIER_MASK) == GDK_CONTROL_MASK)
     return event->keyval != GDK_KEY_n &&
            event->keyval != GDK_KEY_q &&
            event->keyval != GDK_KEY_t &&
@@ -544,7 +544,7 @@ should_web_view_receive_key_press_event (GdkEventKey *event)
            event->keyval != GDK_KEY_Page_Down &&
            event->keyval != GDK_KEY_KP_3;
 
-  if (event->state == (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
+  if ((event->state & GDK_MODIFIER_MASK) == (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
     return event->keyval != GDK_KEY_N &&
            event->keyval != GDK_KEY_T &&
            event->keyval != GDK_KEY_Page_Up &&
@@ -552,7 +552,7 @@ should_web_view_receive_key_press_event (GdkEventKey *event)
            event->keyval != GDK_KEY_Page_Down &&
            event->keyval != GDK_KEY_KP_3;
 
-  if (event->state == GDK_MOD1_MASK)
+  if ((event->state & GDK_MODIFIER_MASK) == GDK_MOD1_MASK)
     return event->keyval != GDK_KEY_Left &&
            event->keyval != GDK_KEY_Right;