Add identity to PythonNativeVoidPtr

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/object/ObjectNodes.java

@@ -78,6 +78,7 @@
 import com.oracle.graal.python.builtins.objects.PNotImplemented;
 import com.oracle.graal.python.builtins.objects.bytes.PBytes;
 import com.oracle.graal.python.builtins.objects.cext.PythonAbstractNativeObject;
+import com.oracle.graal.python.builtins.objects.cext.PythonNativeVoidPtr;
 import com.oracle.graal.python.builtins.objects.common.EconomicMapStorage;
 import com.oracle.graal.python.builtins.objects.common.HashingCollectionNodes;
 import com.oracle.graal.python.builtins.objects.common.HashingStorage;
@@ -342,6 +343,11 @@ Object id(PString self,
             return getObjectIdNode.execute(self);
         }
 
+        @Specialization
+        Object id(PythonNativeVoidPtr self) {
+            return self.getNativePointer();
+        }
+
         protected static boolean isDefaultCase(PythonObject object) {
             return !(object instanceof PFloat || object instanceof PInt || object instanceof PString || object instanceof PTuple || object instanceof PFrozenSet ||
                             object instanceof PythonBuiltinClass);