Made several variables/parameters unsigned in the DX9, DX11 and OGL plugins. They make more sense like this (given their names).

This also gets rid of some more typecasts in some cases.

Source/Plugins/Plugin_VideoDX9/Src/D3DUtil.h

@@ -65,20 +65,20 @@ namespace D3D
 	void quad2d(float x1, float y1, float x2, float y2, u32 color, float u1=0, float v1=0, float u2=1, float v2=1);
 	void drawShadedTexQuad(IDirect3DTexture9 *texture,
 					   const RECT *rSource,
-					   int SourceWidth,
-					   int SourceHeight,
-					   int DestWidth,
-					   int DestHeight,
+					   u32 SourceWidth,
+					   u32 SourceHeight,
+					   u32 DestWidth,
+					   u32 DestHeight,
 					   IDirect3DPixelShader9 *PShader,
 					   IDirect3DVertexShader9 *Vshader,
 					   float Gamma = 1.0f);
 	void drawShadedTexSubQuad(IDirect3DTexture9 *texture,
 							const MathUtil::Rectangle<float> *rSource,
-							int SourceWidth,
-							int SourceHeight,
+							u32 SourceWidth,
+							u32 SourceHeight,
 							const MathUtil::Rectangle<float> *rDest,
-							int DestWidth,
-							int DestHeight,
+							u32 DestWidth,
+							u32 DestHeight,
 							IDirect3DPixelShader9 *PShader,
 							IDirect3DVertexShader9 *Vshader,
 							float Gamma = 1.0f);