make __call__ a varargs builtin

Author: lukasstadler

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/method/AbstractMethodBuiltins.java

@@ -45,6 +45,7 @@
 import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
 import com.oracle.graal.python.nodes.function.PythonBuiltinNode;
 import com.oracle.graal.python.nodes.function.builtins.PythonBinaryBuiltinNode;
+import com.oracle.graal.python.nodes.function.builtins.PythonVarargsBuiltinNode;
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.Fallback;
 import com.oracle.truffle.api.dsl.GenerateNodeFactory;
@@ -61,7 +62,7 @@ protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFa
 
     @Builtin(name = __CALL__, minNumOfArguments = 1, takesVariableArguments = true, takesVariableKeywords = true)
     @GenerateNodeFactory
-    public abstract static class CallNode extends PythonBuiltinNode {
+    public abstract static class CallNode extends PythonVarargsBuiltinNode {
         @Child private CallDispatchNode dispatch = CallDispatchNode.create();
         @Child private CreateArgumentsNode createArgs = CreateArgumentsNode.create();