SAPI: Throw runtime error instead of if l_get_mapgen_object called in incorrect thread

diff --git a/src/script/lua_api/l_mapgen.cpp b/src/script/lua_api/l_mapgen.cpp
index 825292419a7968e8c8a1c6f8bf4f567a7a3495d9..7adb6a534d70d76e9de43952ff0309ebff0b6314 100644 (file)
--- a/src/script/lua_api/l_mapgen.cpp
+++ b/src/script/lua_api/l_mapgen.cpp
@@ -493,7 +493,7 @@ int ModApiMapgen::l_get_mapgen_object(lua_State *L)
        EmergeManager *emerge = getServer(L)->getEmergeManager();
        Mapgen *mg = emerge->getCurrentMapgen();
        if (!mg)
-               return 0;
+               throw LuaError("Must only be called in a mapgen thread!");
 
        size_t maplen = mg->csize.X * mg->csize.Z;