[four-in-a-row] Fix dragging the window after clicking the game view

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 88680db603b0f8e3b871a23ff1b5e748cde24c92
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Fri Sep 11 12:23:14 2015 -0500

    Fix dragging the window after clicking the game view
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754837

 src/main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/main.c b/src/main.c
index 11e0df8..0859d54 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1150,7 +1150,7 @@ create_app (GApplication *app, gpointer user_data)
   gtk_widget_set_valign (drawarea, GTK_ALIGN_FILL);
   gtk_container_add (GTK_CONTAINER (frame), drawarea);
 
-  gtk_widget_set_events (drawarea, GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK);
+  gtk_widget_set_events (drawarea, GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
   g_signal_connect (G_OBJECT (drawarea), "configure_event",
                     G_CALLBACK (on_drawarea_resize), NULL);
   g_signal_connect (G_OBJECT (drawarea), "draw",