patch 7.4.1434

Problem:    JSON encoding doesn't hanel surrogate pair.
Solution:   Improve multi-byte handling of JSON. (Yasuhiro Matsumoto)

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1434,
 /**/
     1433,
 /**/