coccinelle: Extend address test from ifaddr semantic patch to test expressions

The test of an expression's address does not necessarily represent the
whole condition, it may only be a part of it. Also, an expression's
address is likely to be non-zero in every test expression, not only in
if statements.

This change aims at detecting an address test in more complex conditions
and not only in if statements.

Signed-off-by: Jérémy Lefaure <jeremy.lefaure@netatmo.com>
Signed-off-by: Julia Lawall <julia.lawall@inria.fr>

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