[riot-notifications] [RIOT] fib: added check for passing NULL pointers to `fib_get_next_hop()` (#3250)

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Wed Jun 24 09:15:57 CEST 2015

Added a check on the `fib_get_next_hop()` call if one of the out-parameters is a NULL pointer.
Doing so will return `-EINVAL` to the caller, so basically its a tiny API change/extension.
This PR originated from the discussion in #3233 and might help with issue #3249

Additionally added a unittest covering this change.

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-- Commit Summary --

  * fib: added check for passing NULL pointers to `fib_get_next_hop()`

-- File Changes --

    M sys/include/net/ng_fib.h (1)
    M sys/net/network_layer/fib/fib.c (9)
    M tests/unittests/tests-fib/tests-fib.c (40)

-- Patch Links --


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