[evince] shell: Only propagate key press with control on presentation

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 78074fb5c412b461f0fa9ed1d51f27a7247084dd
Author: Jonas Hahnfeld <hahnjo hahnjo de>
Date:   Mon Jul 2 16:45:39 2018 -0400

    shell: Only propagate key press with control on presentation
    
    Propagate only if 'event->state == 0' as implemented in
    commit bed036acf breaks the key handling when NUM lock is
    active.
    
    Fixes #821

 libview/ev-view-presentation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libview/ev-view-presentation.c b/libview/ev-view-presentation.c
index 3450b725..4e02fbf9 100644
--- a/libview/ev-view-presentation.c
+++ b/libview/ev-view-presentation.c
@@ -1163,7 +1163,7 @@ ev_view_presentation_key_press_event (GtkWidget   *widget,
        if (pview->state == EV_PRESENTATION_END)
                 return gtk_bindings_activate_event (G_OBJECT (widget), event);
 
-        if (event->state != 0)
+        if (event->state & GDK_CONTROL_MASK)
                 return gtk_bindings_activate_event (G_OBJECT (widget), event);
 
        switch (event->keyval) {