REGRESSION(r144131): It made fast/js/regress/string-repeat-arith.html assert on 32 bit
https://bugs.webkit.org/show_bug.cgi?id=112106

Rubber stamped by Filip Pizlo.

* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::checkGeneratedTypeForToInt32): Get rid of the case for constants because
we would have done constant folding anyways on a ValueToInt32.
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::fillSpeculateBoolean): Fixed a random compile error with this flag enabled.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146945 268f45cc-cd09-0410-ab3c-d52691b4dbfc