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bug 31289) Fix fatal error on special pages using $this->msg() on PHP 5.2
According to online PHP docs, func_get_args() doesn't work in function parameter lists until PHP 5.3.0.
It does, however, work as the *first* parameter, which happens here and there in older code (eg array_slice(func_get_args(),1)).
Assigning to a variable and passing through works fine for this case on PHP 5.2.17.