patch 7.4.1999

Problem:    evalcmd() doesn't work recursively.
Solution:   Use redir_evalcmd instead of redir_vname.

src/version.c

@@ -758,6 +758,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1999,
 /**/
     1998,
 /**/