patch 7.4.1300

Problem:    Cannot test CursorMovedI because there is typeahead.
Solution:   Add disable_char_avail_for_testing().

src/version.c

@@ -747,6 +747,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1300,
 /**/
     1299,
 /**/