[PATCH] msvcr120: Fixed bugs in Concurrency::critical_section.

[Yifu Wang]

critical_section_lock/try_lock/try_lock_for():
- Fixed a race condition which would corrupt the critical_section data structure and cause critical_section_unlock() to hang.

critical_section_try_lock_for():
- Fixed a bug which would hang the program in the event where timer expires.

Critical_section_unlock():
- Fixed a leak.
---
 dlls/msvcr120/tests/msvcr120.c |  185 +++++++++++++++++++++++++++++++++++++---
 dlls/msvcrt/lock.c             |   27 ++++---
 2 files changed, 190 insertions(+), 22 deletions(-)
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