Fix warnings and duplicated variables

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4155 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/COpenGLDriver.cpp

@@ -251,8 +251,6 @@ bool COpenGLDriver::initDriver(CIrrDeviceWin32* device)
 	const bool pixel_format_supported = (wglExtensions.find("WGL_ARB_pixel_format") != -1);
 	const bool multi_sample_supported = ((wglExtensions.find("WGL_ARB_multisample") != -1) ||
 		(wglExtensions.find("WGL_EXT_multisample") != -1) || (wglExtensions.find("WGL_3DFX_multisample") != -1) );
-	const bool framebuffer_srgb_supported = ((wglExtensions.find("WGL_ARB_framebuffer_sRGB") != -1) ||
-		(wglExtensions.find("WGL_EXT_framebuffer_sRGB") != -1) );
 #ifdef _DEBUG
 	os::Printer::log("WGL_extensions", wglExtensions);
 #endif

source/Irrlicht/COpenGLDriver.h

@@ -502,7 +502,7 @@ namespace video
 
 			const ITexture* operator[](int stage) const
 			{
-				if (stage<MATERIAL_MAX_TEXTURES)
+				if ((u32)stage<MATERIAL_MAX_TEXTURES)
 					return CurrentTexture[stage];
 				else
 					return 0;

source/Irrlicht/COpenGLExtensionHandler.cpp

@@ -248,6 +248,8 @@ void COpenGLExtensionHandler::dumpFramebufferFormats() const
 				memset(vals,0,sizeof(vals));
 #define tmplog(x,y) os::Printer::log(x, core::stringc(y).c_str())
 				const BOOL res = wglGetPixelFormatAttribiv_ARB(hdc,i,0,nums,atts,vals);
+				if (FALSE==res)
+					continue;
 				tmplog("Pixel format ",i);
 				u32 j=0;
 				tmplog("Draw to window " , vals[j]);