[Interpreter] Fix incorrect Register OperandSize calculation for ExtraWide.

src/interpreter/bytecodes.cc

Index: src/interpreter/bytecodes.cc
diff --git a/src/interpreter/bytecodes.cc b/src/interpreter/bytecodes.cc
index 62adec14aa83f066594719affa5f9e0bada54497..3be109f4cbefd6286151d3dbb9a60d857fb96c90 100644
--- a/src/interpreter/bytecodes.cc
+++ b/src/interpreter/bytecodes.cc
@@ -724,7 +724,7 @@ OperandSize Register::SizeOfOperand() const {
   int32_t operand = ToOperand();
   if (operand >= kMinInt8 && operand <= kMaxInt8) {
     return OperandSize::kByte;
-  } else if (index_ >= kMinInt16 && index_ <= kMaxInt16) {
+  } else if (operand >= kMinInt16 && operand <= kMaxInt16) {
     return OperandSize::kShort;
   } else {
     return OperandSize::kQuad;