patch 7.4.2197

Problem:    All functions are freed on exit, which may hide leaks.
Solution:   Only free named functions, not reference counted ones.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2197,
 /**/
     2196,
 /**/