Create RWLock with default attributes, when attributes is a null pointer
Fix redeclaration
License isn't always needed, fixes access violation
Somewhat implemented cellGcmSetFlipImmediate

Also a small change (optimization?) in cellGcmSetPrepareFlip()
Merge pull request #743 from tambry/DefaultRWLock

Create RWLock with default attributes, when attributes is a null pointer
Merge pull request #745 from tambry/DirNameFix

Fix redeclaration
Merge pull request #746 from tambry/DrmAvailableViolationFix

License isn't always needed, fixes access violation
Merge pull request #747 from tambry/FlipImmediate

Somewhat implemented cellGcmSetFlipImmediate