* cygheap.h (struct init_cygheap): Add mt_h member.

* fhandler_tape.cc (mt_h): Drop in favor of cygheap based handle.
	(mtinfo_init): Use cygheap->mt_h handle.  Protect it.

winsup/cygwin/cygheap.h

@@ -253,6 +253,7 @@ struct init_cygheap
   mode_t umask;
   HANDLE shared_h;
   HANDLE console_h;
+  HANDLE mt_h;
   char *cygwin_regname;
   cwdstuff cwd;
   dtable fdtab;