[PATCH]: Silent some warnings in kdevplatform

[Stefan Valouch]

Hi,
the attached patch silents a bunch of warnings from g++ (4.4.1).
Mostly, it puts Q_UNUSED() around parameters and add some brackets where g++ 
suggested them. I tried to stay conform to the formatting styles around the 
changed positions.
On positions where the parameters were just used in Q_ASSERTs, I did not add 
Q_UNUSED, cause I did not want to break something.
Additionally, a comment is added at 
kdevplatform/language/editor/modificationrevision.cpp about the include of a 
(now) deprecated header.

Compiles successfully and KDevelop is happy with it.

Stefan
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