patch 7.4.2323

Problem:    Using freed memory when using 'formatexpr'. (Dominique Pelle)
Solution:   Make a copy of 'formatexpr' before evaluating it.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2323,
 /**/
     2322,
 /**/