Use io::path for DX library handling, in order to allow for Unicode...

Use io::path for DX library handling, in order to allow for Unicode compilation mode. Found by MadHyde

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2736 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CD3D9Driver.cpp

@@ -163,7 +163,7 @@ bool CD3D9Driver::initDriver(const core::dimension2d<u32>& screenSize,
 
 	if (!pID3D)
 	{
-		D3DLibrary = LoadLibrary( "d3d9.dll" );
+		D3DLibrary = LoadLibrary( io::path("d3d9.dll").c_str() );
 
 		if (!D3DLibrary)
 		{

source/Irrlicht/CD3D9ShaderMaterialRenderer.cpp

@@ -325,7 +325,7 @@ HRESULT CD3D9ShaderMaterialRenderer::stubD3DXAssembleShader(LPCSTR pSrcData,
 		if (!pFn && !LoadFailed)
 		{
 			// try to load dll
-			core::stringc strDllName = "d3dx9_";
+			io::path strDllName = "d3dx9_";
 			strDllName += (int)D3DX_SDK_VERSION;
 			strDllName += ".dll";
 
@@ -385,7 +385,7 @@ HRESULT CD3D9ShaderMaterialRenderer::stubD3DXAssembleShaderFromFile(LPCSTR pSrcF
 		if (!pFn && !LoadFailed)
 		{
 			// try to load dll
-			core::stringc strDllName = "d3dx9_";
+			io::path strDllName = "d3dx9_";
 			strDllName += (int)D3DX_SDK_VERSION;
 			strDllName += ".dll";
 
@@ -446,7 +446,7 @@ HRESULT CD3D9ShaderMaterialRenderer::stubD3DXCompileShader(LPCSTR pSrcData, UINT
 		if (!pFn && !LoadFailed)
 		{
 			// try to load dll
-			core::stringc strDllName = "d3dx9_";
+			io::path strDllName = "d3dx9_";
 			strDllName += (int)D3DX_SDK_VERSION;
 			strDllName += ".dll";
 
@@ -506,7 +506,7 @@ HRESULT CD3D9ShaderMaterialRenderer::stubD3DXCompileShaderFromFile(LPCSTR pSrcFi
 		if (!pFn && !LoadFailed)
 		{
 			// try to load dll
-			core::stringc strDllName = "d3dx9_";
+			io::path strDllName = "d3dx9_";
 			strDllName += (int)D3DX_SDK_VERSION;
 			strDllName += ".dll";