updated for version 7.3.304

Problem:    Strawberry Perl doesn't work on MS-Windows.
Solution:   Use xsubpp if needed. (Yasuhiro Matsumoto)

src/version.c

@@ -709,6 +709,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    304,
 /**/
     303,
 /**/