updated for version 7.3.531
Problem:    GUI does not work on MS-Windows.
Solution:   Add the missing #ifdef. (Patrick Avery)
diff --git a/src/gui.c b/src/gui.c
index ed80844..caf1f12 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -102,10 +102,12 @@
     else
 #endif
     {
+#ifdef FEAT_GUI_GTK
 	/* If there is 'f' in 'guioptions' and specify -g argument,
 	 * gui_mch_init_check() was not called yet.  */
 	if (gui_mch_init_check() != OK)
 	    exit(1);
+#endif
 	gui_attempt_start();
     }
 
diff --git a/src/version.c b/src/version.c
index 5167379..ee34eb4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    531,
+/**/
     530,
 /**/
     529,