Daniel Black 4a701e8ce4 MDEV-35640 Protocol_text: handle errors in allocation ...

Protocol_text constructor allocated memory on an optional prealloc argument.
This was along with its subclass Protocol_local.

Remove this functionality to an independent member function "allocate".

Replace two use with existing error handling on insufficient
resources at the err label.

Protocol_local, that inherits from Protocol_text had one use that
requested an allocation of 0. So it wasn't needed.

2025-04-11 23:57:47 +10:00

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