- Fix ((gpu_count++)) returning exit code 1 when count=0
- Fix ((failed_modules++)) same issue in setup_nodejs
- Add || true to all arithmetic increments starting from 0
- Export ENABLE_GPU from build.func to container
- Check ENABLE_GPU instead of var_gpu in setup_hwaccel
The bash arithmetic expansion ((0)) and ((x++)) when x=0
returns exit code 1, which causes immediate script abort
when set -e is active.
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