Decoration: Stop DecoSimple::resolveNodeNames from complaining about …

…no node name if decolist is used

Fix warning message for spawnby nodes

Prevent type-punning warning caused by casting enum to int

src/mapgen.cpp

@@ -382,7 +382,7 @@ void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
 void DecoSimple::resolveNodeNames(INodeDefManager *ndef) {
 	Decoration::resolveNodeNames(ndef);
 
-	if (c_deco == CONTENT_IGNORE) {
+	if (c_deco == CONTENT_IGNORE && !decolist_names.size()) {
 		c_deco = ndef->getId(deco_name);
 		if (c_deco == CONTENT_IGNORE) {
 			errorstream << "DecoSimple::resolveNodeNames: decoration node '"
@@ -394,7 +394,7 @@ void DecoSimple::resolveNodeNames(INodeDefManager *ndef) {
 		c_spawnby = ndef->getId(spawnby_name);
 		if (c_spawnby == CONTENT_IGNORE) {
 			errorstream << "DecoSimple::resolveNodeNames: spawnby node '"
-				<< deco_name << "' not defined" << std::endl;
+				<< spawnby_name << "' not defined" << std::endl;
 			nspawnby = -1;
 			c_spawnby = CONTENT_AIR;
 		}

src/script/lua_api/l_mapgen.cpp

@@ -522,11 +522,11 @@ int ModApiMapgen::l_place_schematic(lua_State *L)
 	if (!read_schematic(L, 2, &dschem, getServer(L)))
 		return 0;
 
-	Rotation rot = ROTATE_0;
+	int rot = ROTATE_0;
 	if (lua_isstring(L, 3))
-		string_to_enum(es_Rotation, (int &)rot, std::string(lua_tostring(L, 3)));
+		string_to_enum(es_Rotation, rot, std::string(lua_tostring(L, 3)));
 
-	dschem.rotation = rot;
+	dschem.rotation = (Rotation)rot;
 
 	if (lua_istable(L, 4)) {
 		int index = 4;