Fix MP3 SAVW support, code cleanup, and more stubs

Runtime/Graphics/CMakeLists.txt

@@ -43,6 +43,7 @@ set(GRAPHICS_SOURCES
     CPVSBounds.hpp CPVSBounds.cpp
     CPVSAreaSet.hpp CPVSAreaSet.cpp
     CGraphics.hpp CGraphics.cpp
+    CSimpleShadow.hpp CSimpleShadow.cpp
     Shaders/TShader.hpp Shaders/TMultiBlendShader.hpp Shaders/TShaderDecl.hpp Shaders/TMultiBlendShaderDecl.hpp
     Shaders/CLineRendererShaders.hpp Shaders/CLineRendererShaders.cpp Shaders/CLineRendererShadersGLSL.cpp
     Shaders/CTexturedQuadFilter.hpp Shaders/CTexturedQuadFilter.cpp Shaders/CTexturedQuadFilterGLSL.cpp

Runtime/Graphics/CSimpleShadow.cpp

@@ -0,0 +1,9 @@
+#include "CSimpleShadow.hpp"
+
+namespace urde
+{
+CSimpleShadow::CSimpleShadow(float, float, float, float)
+{
+
+}
+}

Runtime/Graphics/CSimpleShadow.hpp

@@ -0,0 +1,14 @@
+#ifndef __URDE_CSIMPLESHADOW_HPP__
+#define __URDE_CSIMPLESHADOW_HPP__
+
+namespace urde
+{
+class CSimpleShadow
+{
+public:
+    CSimpleShadow() = default;
+    CSimpleShadow(float, float, float, float);
+};
+}
+
+#endif // __URDE_CSIMPLESHADOW_HPP__