[EFL] build break occurs on webkit efl build.
https://bugs.webkit.org/show_bug.cgi?id=137844

Patch by KwangHyuk Kim <hyuki.kim@samsung.com> on 2014-10-18
Reviewed by Gyuyoung Kim.

As local variable elementAddressRegisterIndex is assigned but not used, there is build break for the webkit efl.

No new tests because it's just to fix build break.

* cssjit/SelectorCompiler.cpp:
(WebCore::SelectorCompiler::SelectorCodeGenerator::generateElementMatchesSelectorList):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@174859 268f45cc-cd09-0410-ab3c-d52691b4dbfc