Reviewed by Sam Weinig.

Bug 44080 introuduced a couple of cases in which array bounds could be overrun.
One of these was fixed in r65493, this patch fixes the other and address the
concerns voiced in comment #6 by restructuring the loops to remove the code
dupliction without introducing an additional if check.

* wtf/text/StringImpl.cpp:
(WTF::StringImpl::find):
(WTF::StringImpl::findIgnoringCase):
(WTF::StringImpl::reverseFind):
(WTF::StringImpl::reverseFindIgnoringCase):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@65571 268f45cc-cd09-0410-ab3c-d52691b4dbfc