[PATCH 1/2] ubox: fix GCC fanalyzer warnings

[Jo-Philipp Wich]

Hi,

> [...]
> -	free(aliases);
> +	if (aliases)
> +	    free(aliases);

This check is redundant, the free() function is guaranteed to be NULL-safe in
the standard:

   The free() function shall cause the space pointed to by ptr to be
   deallocated; that is, made available for further allocation. If ptr is a
   null pointer, no action shall occur.

> [...]

~ Jo

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