[Bug-wget] [PATCH 19/25] Bugfix: Prevent sorting of unallocated metalink resource/metaurl

[Matthew White]

[Coverity Scan is ok, make syntax-check is ok, make check-valgrind is ok, 
contrib/check-hard is ok]

This ensures that Metalink resources/metaurls are sorted only when necessary, 
preventing useless sorting and possible segmentation faults.

The following description is verbatim from the patch:
-----
Trying to sort the resources/metaurls of a metalink when there is only
one element allocated and no tail, or no elements at all, will lead to
a segmentation fault.

Also, sorting the resources/metaurls of a metalink when there is only
one element allocated and a NULL tail is useless.
-----

Regards,
Matthew

-- 
Matthew White <address@hidden>

0019-Bugfix-Prevent-sorting-of-unallocated-metalink-resou.patch
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