updated for version 7.3.626

Problem:    Python interface doesn't build with Python 2.4 or older.
Solution:   Define Py_ssize_t. (Benjamin Bannier)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    626,
 /**/
     625,
 /**/