[riot-notifications] [RIOT-OS/RIOT] gnrc_netreg: bail out if type is not registered (#16629)

benpicco notifications at github.com
Thu Jul 8 16:51:35 CEST 2021


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### Contribution description

If no handler is registered for type, return NULL instead of trying to dereference a NULL pointer.

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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/16629

-- Commit Summary --

  * gnrc_netreg: bail out if type is not registered

-- File Changes --

    M sys/net/gnrc/netreg/gnrc_netreg.c (4)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/16629.patch
https://github.com/RIOT-OS/RIOT/pull/16629.diff

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