updated for version 7.3.1303

Problem:    Undo is synced whenever CTRL-R = is called, breaking some plugins.
Solution:   Only break undo when calling setline() or append().

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1303,
 /**/
     1302,
 /**/