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Ensure that receiver_callback is set before calling it

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This commit is contained in:
adamdunkels 2007-12-16 14:31:43 +00:00
parent c948c97b4f
commit 5c5775e93b
1 changed files with 4 additions and 2 deletions
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6
core/net/mac/nullmac.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: nullmac.c,v 1.4 2007/10/23 21:27:57 adamdunkels Exp $
* $Id: nullmac.c,v 1.5 2007/12/16 14:31:43 adamdunkels Exp $
*/
/**
@ -53,7 +53,9 @@ send(void)
static void
input(const struct radio_driver *d)
{
receiver_callback(&nullmac_driver);
if(receiver_callback) {
receiver_callback(&nullmac_driver);
}
}
/*---------------------------------------------------------------------------*/
static int