[3/5] wined3d: Only set GL_SHADER_OPERATION_NV to GL_NONE for supported units

[H. Verbeet]

glTexEnvi() is only valid for units below GL_LIMITS(textures).

Changelog:
  - Only set GL_SHADER_OPERATION_NV to GL_NONE for supported units
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---

 dlls/wined3d/state.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dlls/wined3d/state.c b/dlls/wined3d/state.c
index bdb4d5b..8223e30 100644
--- a/dlls/wined3d/state.c
+++ b/dlls/wined3d/state.c
@@ -1707,7 +1707,7 @@ static void tex_colorop(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3D
                 glDisable(GL_TEXTURE_CUBE_MAP_ARB);
                 checkGLcall("glDisable(GL_TEXTURE_CUBE_MAP_ARB)");
             }
-            if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
+            if(GL_SUPPORT(NV_TEXTURE_SHADER2) && mapped_stage < GL_LIMITS(textures)) {
                 glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_NONE);
             }
         }