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should not manipulate NULL pointers (even without accessing them)

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Roberto Ierusalimschy
2007-02-07 15:48:52 -02:00
parent 850c60e81b
commit 593bfc9668
2 changed files with 5 additions and 6 deletions
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5
lstate.h
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@@ -1,5 +1,5 @@
/*
** $Id: lstate.h,v 2.26 2006/08/15 19:59:20 roberto Exp roberto $
** $Id: lstate.h,v 2.27 2006/09/19 13:57:50 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@@ -156,8 +156,7 @@ union GCObject {
#define gco2h(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
#define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
#define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
#define ngcotouv(o) \
check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
#define ngcotouv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
#define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
/* macro to convert any Lua object into a GCObject */