wined3d: Respect ARB_VERTEX_BUFFER_OBJECT in loadVertexData.

[Markus Amsler]

Stefan Dösinger wrote:
>> -    GLint curVBO = -1;
>> +    GLint curVBO = GL_SUPPORT(ARB_VERTEX_BUFFER_OBJECT) ? -1 : 0;
> Strange, I thought I sent a patch like that already and it was committed :-/

You wrote it for loadNumberedArrays, I copy pasted it to loadVertexData. 
I  have to admit, I don't know exactly what I'm doing here (opengl/d3d 
newbie). But this patch lets me play Battlefield 1942 on my laptop where 
  ARB_VERTEX_BUFFER_OBJECT is not supported :-)