Fix build on Ubuntu 16.04 and macOS

sfan5 · sfan5 · commit 5c89a0e12a1e · 2021-07-12T12:03:39.000+02:00
Apparently the C++ standard library is supposed to provide
specializations of std::hash for enums (even in C++11)
but those don't always work for whatever reason.
diff --git a/src/client/renderingengine.cpp b/src/client/renderingengine.cpp
@@ -557,13 +557,13 @@ void RenderingEngine::draw_scene(video::SColor skycolor, bool show_hud,
 
 const VideoDriverInfo &RenderingEngine::getVideoDriverInfo(irr::video::E_DRIVER_TYPE type)
 {
-	static const std::unordered_map<irr::video::E_DRIVER_TYPE,VideoDriverInfo> driver_info_map = {
-		{irr::video::EDT_NULL, {"null", "NULL Driver"}},
-		{irr::video::EDT_OPENGL, {"opengl", "OpenGL"}},
-		{irr::video::EDT_OGLES1, {"ogles1", "OpenGL ES1"}},
-		{irr::video::EDT_OGLES2, {"ogles2", "OpenGL ES2"}},
+	static const std::unordered_map<int, VideoDriverInfo> driver_info_map = {
+		{(int)video::EDT_NULL,   {"null",   "NULL Driver"}},
+		{(int)video::EDT_OPENGL, {"opengl", "OpenGL"}},
+		{(int)video::EDT_OGLES1, {"ogles1", "OpenGL ES1"}},
+		{(int)video::EDT_OGLES2, {"ogles2", "OpenGL ES2"}},
 	};
-	return driver_info_map.at(type);
+	return driver_info_map.at((int)type);
 }
 
 #ifndef __ANDROID__
