It's mostly a copy of vertexdeclaration() from state.c, with a few
differences due to the new function being private to the GLSL backend
(e.g. d3d_info.vs_clipping is known to be TRUE) and the fragment fog
update part being split out.

winejoystick: Fix a crash on accessing a CFArray past its end due to an off-by-one error in the Mac code.

wined3d: Depend on the vertex shader state instead of the vertex declaration state where appropriate.