updated for version 7.3.518

Problem:    When 'encoding' is a double-byte encoding ":helptags" may not find
            tags correctly.
Solution:   Use vim_strbyte() instead of vim_strchr(). (Yasuhiro Matsumoto)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    518,
 /**/
     517,
 /**/