message: Cast AXOM_NULLPTR to void *, to appease the compiler.
diff: @@ -828,7 +828,7 @@ TEST(sidre_group,groups_move_copy)
  otherB->getView("f1")->setScalar(42.0);
  otherB->createGroup("Q");
  Group * triedCopy = gsub->copyGroup(otherB);
  - EXPECT_EQ(triedCopy, AXOM_NULLPTR);
  + EXPECT_EQ(triedCopy, static_cast<void *>(AXOM_NULLPTR));
  EXPECT_EQ(gsub->getNumGroups(), 1);
  EXPECT_TRUE(gsub->hasChildGroup("b"));
  