updated for version 7.3.520
Problem:    Gvim starts up slow on Unbuntu 12.04.
Solution:   Move the call to gui_mch_init_check() to after fork(). (Yasuhiro
            Matsumoto)  Do check $DISPLAY being set.
diff --git a/src/version.c b/src/version.c
index accf0b9..34bba78 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    520,
+/**/
     519,
 /**/
     518,