patch 7.4.1128
Problem:    MS-Windows: delete() does not recognize junctions.
Solution:   Add mch_isrealdir() for MS-Windows. Update mch_is_symbolic_link().
            (Ken Takata)
diff --git a/src/proto/os_win32.pro b/src/proto/os_win32.pro
index 7cdd156..b3acb4f 100644
--- a/src/proto/os_win32.pro
+++ b/src/proto/os_win32.pro
@@ -21,6 +21,7 @@
 void mch_hide __ARGS((char_u *name));
 int mch_ishidden __ARGS((char_u *name));
 int mch_isdir __ARGS((char_u *name));
+int mch_isrealdir __ARGS((char_u *name));
 int mch_mkdir __ARGS((char_u *name));
 int mch_rmdir __ARGS((char_u *name));
 int mch_is_hard_link __ARGS((char_u *fname));