patch 8.0.1702: leaking memory when autocommands make quickfix list invalid

Problem:    Leaking memory when autocommands make a quickfix list invalid.
Solution:   Call FreeWild(). (Yegappan Lakshmanan)

Author: brammool

src/quickfix.c

@@ -4556,7 +4556,10 @@ ex_vimgrep(exarg_T *eap)
 	/* Check whether the quickfix list is still valid. When loading a
 	 * buffer above, autocommands might have changed the quickfix list. */
 	if (!vgr_qflist_valid(wp, qi, save_qfid, *eap->cmdlinep))
+	{
+	    FreeWild(fcount, fnames);
 	    goto theend;
+	}
 	save_qfid = qi->qf_lists[qi->qf_curlist].qf_id;
 
 	if (buf == NULL)

src/version.c

@@ -762,6 +762,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1702,
 /**/
     1701,
 /**/