This fixes a major buffer overflow bug in 'regedit /E'.

Get rid of most of the macros that make it hard to handle special cases.

This reflects the fact that they describe the fragment pipeline.
The vertex pipeline will use its own structures.

Add a test that checks what happens if D3DRS_POINTSIZE, D3DRS_POINTSIZE_MIN
and POINTSIZE_MAX have conflicting values. D3DRS_POINTSIZE_MAX trumps
D3DRS_POINTSIZE_MIN, and both MIN and MAX clamp the D3DRS_POINTSIZE value if it is
outside of their range.

The code here skipped constant loading when a pixel shader was in use,
and only reloaded them on ffp use if the shader implementation used
ARB too. This way a e.g. texfactor change could get lost if GLSL
shaders are used, and the texfactor changed while a pixel shader was
in use.

ntdll: wine_nt_to_unix_file_name() parse string to int instead of cast char, where string may be passed.