Check Lua stack before pushing cons args

Prevents a Lua stack overrun when executing absurd console commands for
local-only lua commands.

src/lua_consolelib.c

@@ -184,6 +184,11 @@ void COM_Lua_f(void)
 	I_Assert(lua_isfunction(gL, -1));
 	lua_remove(gL, -2); // pop command info table
 
+	if (!lua_checkstack(gL, COM_Argc() + 1))
+	{
+		CONS_Alert(CONS_WARNING, "lua command stack overflow (%d, need %s more)\n", lua_gettop(gL), sizeu1(COM_Argc() + 1));
+		return;
+	}
 	LUA_PushUserdata(gL, &players[playernum], META_PLAYER);
 	for (i = 1; i < COM_Argc(); i++)
 		lua_pushstring(gL, COM_Argv(i));