Fix assert in logicalmsg_desc

The assert, introduced by 9f1cf97bb5, is intended to check if the prefix
is terminated by a \0 byte, but it has two flaws. Firstly, prefix_size
includes the \0 byte, so prefix[prefix_size] points to the byte after
the null byte. Secondly, the check ensures the byte is not equal \0,
while it should be checking the opposite.

Backpatch-through: 14
Discussion: https://postgr.es/m/[email protected]

0 files changed, 0 insertions, 0 deletions