vkd3d-shader/hlsl: Parse the outputcontrolpoints attribute.

Approved-by: Elizabeth Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1015

libs/vkd3d-shader/hlsl.c

@@ -4275,6 +4275,7 @@ static bool hlsl_ctx_init(struct hlsl_ctx *ctx, const struct vkd3d_shader_compil
     }
 
     ctx->domain = VKD3D_TESSELLATOR_DOMAIN_INVALID;
+    ctx->output_control_point_count = UINT_MAX;
 
     return true;
 }