comdlg32: GetPrinterW and GetPrinterDriverW return the size in bytes so don't multiply by sizeof(WCHAR).

This avoids the double search for a pixel shader. The pixel shader
compilation parameter structure is recorded in the GLSL program
hashmap, together with the WineD3D pixel shader.

The dx7 sdk demos need this.

Some stateblock parameters have to be compiled into the GL pixel
shader code, like lines for pixelformat fixups. This leads to problems
when applications switch those settings, requiring a recompilation of
the shader. This patch enables wined3d to have multiple GL shaders for
a D3D shader(pixel shaders only so far) to handle this more
efficiently.