Avoid mipmaps by default, when rendering 2d elements

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3422 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CNullDriver.cpp

@@ -189,6 +189,7 @@ CNullDriver::CNullDriver(io::IFileSystem* io, const core::dimension2d<u32>& scre
 	InitMaterial2D.Lighting=false;
 	InitMaterial2D.ZWriteEnable=false;
 	InitMaterial2D.ZBuffer=video::ECFN_NEVER;
+	InitMaterial2D.UseMipMaps=false;
 	for (u32 i=0; i<video::MATERIAL_MAX_TEXTURES; ++i)
 	{
 		InitMaterial2D.TextureLayer[i].BilinearFilter=false;