updated for version 7.3.522
Problem:    Crash in vim_realloc() when using MEM_PROFILE.
Solution:   Avoid using a NULL argument. (Dominique Pelle)
diff --git a/src/version.c b/src/version.c
index dd6700d..0c866c5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    522,
+/**/
     521,
 /**/
     520,