* poppler/TextOutputDev.cc (TextBlock::visitSelection): Assign
        start and stop coordinates in one place so we don't assign the
        same point to both in some corner cases.
        (TextWord::visitSelection): Initialize begin to len, not len + 1
        to fix crash.

        (TextWord::visitSelection, TextLine::visitSelection): Change
        selection trigger; now midpoint of glyph must be included in
        selection area for glyph to be in selection.