Default initialize TransformStorage's frame_id_ and child_frame_id_ with UINT32_MAX (#783)

* Fix comparison of TransformStorage with zero-initialized / default-constructed frame ids (#771)

* Revert "Fix comparison of TransformStorage with zero-initialized / default-constructed frame ids (#771)"

This reverts commit 4381a9d.

* default initialize TransformStorage's frame_id_ and child_frame_id_ with UINT32_MAX

Author: andschi

tf2/include/tf2/transform_storage.hpp

@@ -87,8 +87,8 @@ class TransformStorage
   tf2::Quaternion rotation_;
   tf2::Vector3 translation_;
   TimePoint stamp_;
-  CompactFrameID frame_id_;
-  CompactFrameID child_frame_id_;
+  CompactFrameID frame_id_{UINT32_MAX};
+  CompactFrameID child_frame_id_{UINT32_MAX};
 };
 }  // namespace tf2
 #endif  // TF2__TRANSFORM_STORAGE_HPP_