Including stddef.h for NULL seems to be somewhat more portable than stdlib.h.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: profile.c,v 1.2 2007/11/17 10:14:19 adamdunkels Exp $
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* $Id: profile.c,v 1.3 2007/11/18 19:16:49 oliverschmidt Exp $
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*/
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/**
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#include "sys/profile.h"
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#include <stdlib.h> /* For NULL */
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#include <stddef.h> /* For NULL */
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unsigned int profile_timestamp_ptr;
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struct profile_timestamp profile_timestamps[PROFILE_LIST_LENGTH];
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