Eliminate AV_QSV_ZERO_MEMORY macro
Eliminate AV_QSV_CHECK_POINTER macro.
Eliminate AV_QSV_IGNORE_MFX_STS macro.
Remove unused AV_QSV_DEBUG_ASSERT macro.
Remove unused AV_QSV_ALIGN16 macro.
Eliminate av_qsv_sleep macro.
Add some parentheses around macro arguments.
Add some convenience macros to wrap conditional mutex handling.
Eliminate another pointless return value indirection.
Eliminate another pointless variable initialization.
small header #include cleanup
Merge pull request #2 from DonDiego/qsv

more small cleanup