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Get rid of !this and similar constructs
Lars Knoll authored
The C++ standard doesn't allow calling member functions
on a mull object. Fix all such places, by moving the checks
to the caller where required.

Change-Id: I10fb22acaf0324d8ffd3a6d8e19152e5d32f56bb
Reviewed-by: default avatarSimon Hausmann <simon.hausmann@digia.com>
0704d2be