Post commit review: RT-34514: [D3D] fix for RT-33390 is incorrect

[Vadim Pakhnushev]

This is post commit notification.

The fix for RT-33390 was incorrectly resetting clip on failures as well.
In this follow-up fix we reset clip only of the call was succeeded and 
render target was changed, which indicated by the D3D_OK return value.
If the call was succeeded, but render target was not changed, native 
method return S_FALSE and we do not reset clip.
https://javafx-jira.kenai.com/browse/RT-34514
http://cr.openjdk.java.net/~vadim/RT-34514/webrev.00/

Thanks,
Vadim