Improve handling of property loads on the proto chain.

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index 4643f95f48e2f4f5fbaeadfa4894bcc637098d95..b965e11b1fcfe3f030d60d6159ca717d1a1d7f79 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -2232,7 +2232,7 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 1> {
+class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 1> {
  public:
   explicit LCheckPrototypeMaps(LOperand* temp)  {
     temps_[0] = temp;