Use Patti Yeh's hack to determine the appropriate rectangle

	Use Patti Yeh's hack to determine the appropriate rectangle
	to place the "associated word" window.
	If there is no marked text firstRectForCharacterRange: will
	use the selected range to determine the returned rectangle,
	ignoring the input range.  This is the fix from
	4029491 that I previously backed out.

        Reviewed by Vicki.

        * WebView.subproj/WebHTMLView.m:
        (-[WebHTMLView firstRectForCharacterRange:]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8967 268f45cc-cd09-0410-ab3c-d52691b4dbfc