[Truffle] DispatchHeadNodes using doesRespondTo should have RETURN_MISSING.

Author: eregon

core/src/main/java/org/jruby/truffle/nodes/core/KernelNodes.java

@@ -1481,8 +1481,8 @@ public abstract static class RespondToNode extends CoreMethodNode {
         public RespondToNode(RubyContext context, SourceSection sourceSection) {
             super(context, sourceSection);
 
-            dispatch = new DispatchHeadNode(context, false, Dispatch.MissingBehavior.CALL_METHOD_MISSING);
-            dispatchIgnoreVisibility = new DispatchHeadNode(context, true, Dispatch.MissingBehavior.CALL_METHOD_MISSING);
+            dispatch = new DispatchHeadNode(context, false, Dispatch.MissingBehavior.RETURN_MISSING);
+            dispatchIgnoreVisibility = new DispatchHeadNode(context, true, Dispatch.MissingBehavior.RETURN_MISSING);
 
             if (Options.TRUFFLE_DISPATCH_METAPROGRAMMING_ALWAYS_UNCACHED.load()) {
                 dispatch.forceUncached();