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Fix for Issue #1277

Ed Lee requested to merge LuckyEddie/siril:master into master

Description

This MR addresses Issue #1277

Changes Made

I found that read appears to sometimes return 0 bytes read immediately after a successful (non 0 byte read). As a 0 byte read was handled the same as an error the command queue was emptied in this condition. I've added a separate retval of -2 for a 0 byte read which still closes the read pipe but does not clear the command queue. Only errors and a cancel command now do so.

Merge Request Checklists

  • Code follows project coding guidelines and its checklist
  • (N/A) I have submitted a MR in the documentation repository if required
  • I have updated Changelog and NEWS, listing the related issues.
  • (N/A) If my MR introduces new dependencies, I have run all the CIs, even the optional (manual) jobs.
Edited by Ed Lee

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