patch 7.4.2193
Problem:    With Gnome when the GUI can't start test_startup hangs.
Solution:   Call gui_mch_early_init_check(). (Hirohito Higashi)
diff --git a/src/gui.c b/src/gui.c
index 88b5d7b..0d858ec 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -447,7 +447,7 @@
      * See gui_do_fork().
      * Use a simpler check if the GUI window can probably be opened.
      */
-    result = gui.dofork ? gui_mch_early_init_check() : gui_mch_init_check();
+    result = gui.dofork ? gui_mch_early_init_check(TRUE) : gui_mch_init_check();
 # else
     result = gui_mch_init_check();
 # endif