Update pymavlink: Fix buffer alignment on ESP32/ARM #424
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Summary
Updates pymavlink submodule to include buffer alignment fixes for ESP32 (Xtensa) and ARM platforms.
Problem
MAVLink message corruption was observed on ESP32 platforms running ArduPilot, with symptoms including:
Solution
This PR updates the pymavlink submodule to include alignment fixes that ensure proper memory alignment on platforms that require it.
Related PRs
Testing
Impact
This fix is critical for ESP32 and ARM-based flight controllers using MAVLink communication.