[d3d9] Clamp stage and type in [G,S]etTextureStageState

This is what happens on the Nvidia D3D9 driver.
Dawn of Magic 2 calls SetTextureStageState with a
stage > 7 and expects that to succeed.

src/d3d9/d3d9_device.cpp

@@ -3876,13 +3876,13 @@ namespace dxvk {
           DWORD                      Stage,
           D3D9TextureStageStateTypes Type,
           DWORD                      Value) {
-    D3D9DeviceLock lock = LockDevice();
-
-    if (unlikely(Stage >= caps::TextureStageCount))
-      return D3DERR_INVALIDCALL;
+
+    // Clamp values instead of checking and returning INVALID_CALL
+    // Matches tests + Dawn of Magic 2 relies on it.
+    Stage = std::min(Stage, DWORD(7));
+    Type = std::min(Type, DXVK_TSS_CONSTANT);
 
-    if (unlikely(Type >= TextureStageStateCount))
-      return D3DERR_INVALIDCALL;
+    D3D9DeviceLock lock = LockDevice();
 
     if (unlikely(ShouldRecord()))
       return m_recorder->SetStateTextureStageState(Stage, Type, Value);

src/d3d9/d3d9_stateblock.cpp

@@ -213,6 +213,9 @@ namespace dxvk {
           DWORD                      Stage,
           D3D9TextureStageStateTypes Type,
           DWORD                      Value) {
+    Stage = std::min(Stage, DWORD(7));
+    Type = std::min(Type, DXVK_TSS_CONSTANT);
+
     m_state.textureStages[Stage][Type] = Value;
 
     m_captures.flags.set(D3D9CapturedStateFlag::TextureStages);