workaround for older ati drivers

Source/Plugins/Plugin_VideoOGL/Src/Render.cpp

@@ -451,6 +451,11 @@ Renderer::Renderer()
 	glBlendColor(0, 0, 0, 0.5f);
 	glClearDepth(1.0f);
 	
+	// this is a hack to work around an ati driver issue.
+	// usually this shouldn't be needed (and isn't allowed in core)
+	// but else glGenerateMipmaps wouldn't work always
+	glEnable(GL_TEXTURE_2D);
+
 	UpdateActiveConfig();
 
 	//return GL_REPORT_ERROR() == GL_NO_ERROR && bSuccess;