updated for version 7.3.671

Problem:    More Python code can be shared between Python 2 and 3.
Solution:   Move code to if_py_both.h. (ZyX)

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    671,
 /**/
     670,
 /**/