patch 7.4.714

Problem:    Illegal memory access when there are illegal bytes.
Solution:   Check the byte length of the character. (Dominique Pelle)

src/regexp.c

@@ -6113,7 +6113,7 @@ do_class:
 	    {
 		if (ireg_ic && enc_utf8)
 		    cf = utf_fold(utf_ptr2char(opnd));
-		while (count < maxcount)
+		while (count < maxcount && (*mb_ptr2len)(scan) >= len)
 		{
 		    for (i = 0; i < len; ++i)
 			if (opnd[i] != scan[i])

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    714,
 /**/
     713,
 /**/