winex11: Add a critical section for the palette global variables instead of relying on the GDI lock.

comctl32/tests: Call InitCommonControlsEx() if available, fall back to InitCommonControls() for the older controls, and skip the tests altogether for the newer ones.

We can't return WINED3D_OK straight away because we have yet to check
the other flags, like sRGB correction.

Conditional NP2 textures in Direct3D do not support D3DTADDRESS_WRAP
texture addressing. Similarly, GL_ARB_texture_rectangle textures do
not support GL_REPEAT. This patch adds a test which shows that _WRAP
clamps to the texture edge and implements that.

We have to destroy potential fbo renderbuffers, and make sure the
texture is gone

Include d3dx8mesh.h in d3dx8.h and add some commented out ones as reminders.