Avoid duplicated render state resets in 2d mode under OpenGL

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3486 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/COpenGLDriver.cpp

@@ -3044,6 +3044,9 @@ void COpenGLDriver::setRenderStates2DMode(bool alpha, bool texture, bool alphaCh
 			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 		}
 		setTransform(ETS_TEXTURE_0, core::IdentityMatrix);
+		// Due to the transformation change, the previous line would call a reset each frame
+		// but we can safely reset the variable as it was false before
+		Transformation3DChanged=false;
 
 		if (alphaChannel)
 		{