Fix null-pointer dereference in the compiler when running without sse3 support.

BUG=77654
Review URL: http://codereview.chromium.org/6731046

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7408 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/lithium-ia32.cc

@@ -1635,7 +1635,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
       if (needs_check) {
         CpuFeatures* cpu_features = Isolate::Current()->cpu_features();
         LOperand* xmm_temp =
-            (instr->CanTruncateToInt32() && !cpu_features->IsSupported(SSE3))
+            (instr->CanTruncateToInt32() && cpu_features->IsSupported(SSE3))
             ? NULL
             : FixedTemp(xmm1);
         LTaggedToI* res = new LTaggedToI(value, xmm_temp);