* dtable.h (dtable::in_vfork_cleanup): New function. True if vfork cleanup

needed.
* dtable.cc (dtable::vfork_parent_restore): Remove assertion.
* pipe.cc (fhandler_pipe::close): Don't close read_state during fork_fixup
since it wasn't inherited.

winsup/cygwin/dtable.h

@@ -79,6 +79,7 @@ public:
   void stdio_init ();
   void get_debugger_info ();
   void set_file_pointers_for_exec ();
+  bool in_vfork_cleanup () {return fds_on_hold == fds;}
 };
 
 void dtable_init (void);