patch 7.4.2319

Problem:    No way for a system wide vimrc to stop loading defaults.vim.
            (Christian Hesse)
Solution:   Bail out of defaults.vim if skip_defaults_vim was set.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2319,
 /**/
     2318,
 /**/