Bugfix: Lua shutdown (possible NULL reference)

Russian, French and Polish texts update
Fonts update (for future Italian version)

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@2463 3b4a5df2-a311-0410-b5c6-a8a6f20db521

lua/lua.cpp

@@ -227,6 +227,10 @@ int EvalLua (const wchar_t* buff) {
 	return TRUE;
 }
 
-void ShutdownLua( ) {
-	lua_close(L);
+void ShutdownLua( )
+{
+	if(L)
+	{
+		lua_close(L);
+	}
 }