[PATCH] msvcrt: gets() should handle EOF on stdin gracefully

[Piotr Caban]

Hi James,

Could you please change following parts of the patch:
  - please rebase the patch against current git (it doesn't apply)
  - please add a signed-off-by header to the patch 
(https://wiki.winehq.org/Submitting_Patches)
  - please move "MSVCRT__unlock_file(MSVCRT_stdin);" call after the for 
loop.

Thanks,
Piotr