patch 7.4.1399
Problem:    The MS-DOS code does not build.
Solution:   Remove the old MS-DOS code.
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index e105fa0..ec20daa 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -4256,8 +4256,7 @@
 {
     char_u	*loc;
 
-    /* Obtain the locale value from the libraries.  For DJGPP this is
-     * redefined and it doesn't use the arguments. */
+    /* Obtain the locale value from the libraries. */
     loc = (char_u *)setlocale(what, NULL);
 
 # ifdef WIN32