Crashes in setTextForIterator

https://bugs.webkit.org/show_bug.cgi?id=127424

Patch by peavo@outlook.com <peavo@outlook.com> on 2014-01-22
Reviewed by Brent Fulgham.

* platform/text/icu/UTextProviderLatin1.cpp:
(WebCore::uTextLatin1Clone): Provide correct buffer size in utext_setup function call.
(WebCore::uTextLatin1Access): Give correct buffer size to memset call.
(WebCore::openLatin1UTextProvider): Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162544 268f45cc-cd09-0410-ab3c-d52691b4dbfc