Fix C++ parent class method completion.

[baohaojun]

For e.g., in Qt, QFile has a close() method inherited:

void QFileDevice::close();
void QIODevice::close();

Now, when close() is completed, it turns out to be close:close(), because :close() instead of () is incorrectly parsed as the argument.

Signed-off-by: Bao Haojun baohaojun@gmail.com