wined3d: Make the shader parameter to shader_arb_generate_vshader() const.

[wine] / dlls / dssenh / dssenh.spec

@ stub CPAcquireContext
@ stub CPCreateHash
@ stub CPDecrypt
@ stub CPDeriveKey
@ stub CPDestroyHash
@ stub CPDestroyKey
@ stub CPDuplicateHash
@ stub CPDuplicateKey
@ stub CPEncrypt
@ stub CPExportKey
@ stub CPGenKey
@ stub CPGenRandom
@ stub CPGetHashParam
@ stub CPGetKeyParam
@ stub CPGetProvParam
@ stub CPGetUserKey
@ stub CPHashData
@ stub CPHashSessionKey
@ stub CPImportKey
@ stub CPReleaseContext
@ stub CPSetHashParam
@ stub CPSetKeyParam
@ stub CPSetProvParam
@ stub CPSignHash
@ stub CPVerifySignature
@ stdcall -private DllRegisterServer()
@ stdcall -private DllUnregisterServer()