patch 7.4.1037
Problem:    Using "q!" when there is a modified hidden buffer does not unload
            the current buffer, resulting in the need to abandon it again.
Solution:   When using "q!" unload the current buffer when needed. (Yasuhiro
            Matsumoto, Hirohito Higashi)
diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index e543b0a..9967795 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -2003,7 +2003,7 @@
      * If there are changed buffers, present the user with
      * a dialog if possible, otherwise give an error message.
      */
-    shutdown_cancelled = check_changed_any(FALSE);
+    shutdown_cancelled = check_changed_any(FALSE, FALSE);
 
     exiting = FALSE;
     cmdmod = save_cmdmod;