pgsql: Reset conn->errorReported when PQrequestCancel sets errorMessage

Reset conn->errorReported when PQrequestCancel sets errorMessage.

Oversight in commit 618c16707.  This is mainly neatnik-ism, since
if PQrequestCancel is used per its API contract, we should perform
pqClearConnErrorState before reaching any place that would consult
errorReported.  But still, it seems like a bad idea to potentially
leave errorReported pointing past errorMessage.len.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/83a7637e2c5be27a0788b920501dde284b3fca33

Modified Files
--------------
src/interfaces/libpq/fe-connect.c | 4 ++++
1 file changed, 4 insertions(+)