From Lua 5.2: Add debug.upvalueid() and debug.upvaluejoin().

Ditto for lua_upvalueid() and lua_upvaluejoin().

src/lj_errmsg.h

@@ -44,6 +44,7 @@ ERRDEF(BADVAL,	"invalid value")
 ERRDEF(NOVAL,	"value expected")
 ERRDEF(NOCORO,	"coroutine expected")
 ERRDEF(NOTABN,	"nil or table expected")
+ERRDEF(NOLFUNC,	"Lua function expected")
 ERRDEF(NOFUNCL,	"function or level expected")
 ERRDEF(NOSFT,	"string/function/table expected")
 ERRDEF(NOPROXY,	"boolean or proxy expected")