updated for version 7.4.615

Problem:    Vim hangs when freeing a lot of objects.
Solution:   Do not go back to the start of the list every time.  (Yasuhiro
            Matsumoto and Ariya Mizutani)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    615,
 /**/
     614,
 /**/