patch 7.4.1498

Problem:    Error for locked item when using json_decode(). (Shougo)
Solution:   Initialize v_lock.

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1498,
 /**/
     1497,
 /**/