Typo fix after r159834 to fix 32 bit builds.

Patch by Peter Gal <galpeter@inf.u-szeged.hu> on 2013-11-28
Reviewed by Csaba Osztrogonác.

* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::compile):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159836 268f45cc-cd09-0410-ab3c-d52691b4dbfc