Fix EmitC NamedAttribute fix.

PiperOrigin-RevId: 411671111
diff --git a/iree/compiler/Dialect/VM/Conversion/VMToEmitC/ConvertVMToEmitC.cpp b/iree/compiler/Dialect/VM/Conversion/VMToEmitC/ConvertVMToEmitC.cpp
index 50403b0..b72501e 100644
--- a/iree/compiler/Dialect/VM/Conversion/VMToEmitC/ConvertVMToEmitC.cpp
+++ b/iree/compiler/Dialect/VM/Conversion/VMToEmitC/ConvertVMToEmitC.cpp
@@ -1365,7 +1365,7 @@
           indexSequence(adaptor.getOperands().size(), op.getContext());
 
       for (NamedAttribute attr : op->getAttrs()) {
-        args_.push_back(attr.second);
+        args_.push_back(attr.value);
       }
 
       args = rewriter.getArrayAttr(args_);