updated for version 7.4.520

Problem:    Sun PCK locale is not recognzed.
Solution:   Add PCK in the table. (Keiichi Oono)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    520,
 /**/
     519,
 /**/