DDS12 — Illegal return value register_instance

Summary:
In section 2.1.2.4.2.5 register_instance the description states that if this operation exceeds the max_blocking_time this operation will return TIMEOUT. However this is not possible because the operation cannot return a ReturnCode_t value.

Proposed Resolution:

Proposed Revised Text:

Section section 2.1.2.4.2.5 register_instance
At the end of the 5th paragraph Replace:
If max_blocking_time elapses before the DataWriter is able to store the modification without exceeding the limits, the operation will fail and return TIMEOUT

With:
If max_blocking_time elapses before the DataWriter is able to store the modification without exceeding the limits, the operation will fail and return HANDLE_NIL

State that in this case the operation will return HANDLE_NIL instead