updated for version 7.3.715

Problem:    Crash when calling setloclist() in BufUnload autocmd. (Marcin
            Szamotulski)
Solution:   Set w_llist to NULL when it was freed.  Also add a test.
            (Christian Brabandt)

src/version.c

@@ -725,6 +725,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    715,
 /**/
     714,
 /**/