patch 7.4.1731

Problem:    Python: turns partial into simple funcref.
Solution:   Use partials like partials. (Nikolai Pavlov, closes #734)

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1731,
 /**/
     1730,
 /**/