Reviewed by John.

    Reviewed by John.

	<rdar://problem/3778314> REGRESSION: Can't proceed to survey questions on Lominger's Apple website

	Because we will stop parsing when there is a pending redirection,
	avoid setting one if no navigation would actually take place
	because the number of steps is out of range.

        * khtml/khtml_part.cpp:
        (KHTMLPart::scheduleHistoryNavigation):
        * kwq/KWQKHTMLPart.h:
        * kwq/KWQKHTMLPart.mm:
        (KWQKHTMLPart::canGoBackOrForward):
        * kwq/KWQKPartsBrowserInterface.h:
        * kwq/WebCoreBridge.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@7397 268f45cc-cd09-0410-ab3c-d52691b4dbfc