prototype for 'luaO_ceillog2' was different from definition

lobject.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 2.44 2010/12/06 21:08:36 roberto Exp roberto $
+** $Id: lobject.h,v 2.45 2010/12/10 14:53:15 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -409,7 +409,7 @@ LUAI_DDEC const TValue luaO_nilobject_;
 
 LUAI_FUNC int luaO_int2fb (unsigned int x);
 LUAI_FUNC int luaO_fb2int (int x);
-LUAI_FUNC int luaO_ceillog2 (lu_int32 x);
+LUAI_FUNC int luaO_ceillog2 (unsigned int x);
 LUAI_FUNC lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2);
 LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2);
 LUAI_FUNC int luaO_str2d (const char *s, size_t len, lua_Number *result);