subshell doesn't close on exit on cygwin

[Marco atzeri <marco atzeri gmail com>]

Hi,
I am working on the 4.7.5.2 package for cygwin.

The current cygwin package (4.6.1) is shipped with subshell disabled
as on exit (Menu F10) the subshell remains open while mc close.

The same happens on 4.7.5.2, to replicate:

 $ ps ax
      PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
     4460       1    4460       4460    ? 1006 09:52:34 /usr/bin/mintty
     6140    4460    6140        452    0 1006 09:52:34 /usr/bin/bash
     2196    6140    2196       1876    0 1006 10:44:14 /usr/bin/ps


$ mc
(2 times ctrl-O to activate the subshell and return)

$ ps ax
      PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
     4460       1    4460       4460    ? 1006 09:52:34 /usr/bin/mintty
     6140    4460    6140        452    0 1006 09:52:34 /usr/bin/bash
I     984       1     984       4516    0 1006 10:44:20 /usr/bin/bash
      432    6140     432       5992    0 1006 10:44:29 /usr/bin/ps


Any suggestion to investigate the problem ?

Marco