- Add ASSERT_MUTANT and ASSERT_SEMAPHORE to our DDK.

- Add ASSERT_MUTANT and ASSERT_SEMAPHORE to our DDK.
- Cleanup mutex.c and sem.c. No real code changes, just add ASSERTs, STDCALL->NTAPI, IN/OUT decoration.
- One change though, in KeReleaseMutant, use KeLeaveCriticalRegion instead of manually writing down the code, it's more readable this way.

svn path=/trunk/; revision=24039