updated for version 7.3.439

Problem:    Compiler warnings to size casts in Perl interface.
Solution:   Use XS macros. (James McCoy)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    439,
 /**/
     438,
 /**/