`lua_setfallback' leaves things on the stack, so it is better to protect

it.

linit.c

@@ -1,5 +1,5 @@
 /*
-** $Id: linit.c,v 1.1 1999/01/08 16:49:32 roberto Exp roberto $
+** $Id: linit.c,v 1.2 1999/11/22 13:12:07 roberto Exp roberto $
 ** Initialization of libraries for lua.c
 ** See Copyright Notice in lua.h
 */
@@ -11,9 +11,11 @@
 
 
 void lua_userinit (lua_State *L) {
+  lua_beginblock(L);
   lua_iolibopen(L);
   lua_strlibopen(L);
   lua_mathlibopen(L);
   lua_dblibopen(L);
+  lua_endblock(L);
 }