DiveSystem: Handle APOS5 sample record alias fix.

[zorcik]

Adressing libdivecomputer/libdivecomputer#68

Summary

Firmware 50211016 changed the record type field in sample records, causing libdivecomputer to skip all dive samples (treating them as non-sample metadata records). This results in 0m depth and 0min time for every imported dive.

Root Cause

The sample record type field at byte offset 52 (a uint16_le) changed its value for ordinary profile samples:

Firmware	Record Type Value	Interpreted As
50206016 (old, works)	0x0000	REC_SAMPLE ✅ → parsed
50211016 (new, broken)	0x800E	unknown → skipped ❌

What happens in the code

In [divesystem_idive_parser.c]:

// Get the record type.
unsigned int type = ISIX3M(parser->model) ?
    array_uint16_le (data + offset + 52) :
    REC_SAMPLE;

// APOS5 uses 0x8006 for ordinary profile samples.
if (firmware_major >= 5 && type == REC_SAMPLE_APOS5_COMPAT)  // 0x8006
    type = REC_SAMPLE;

if (type != REC_SAMPLE) {
    // Skip non-sample records.    ← ALL 0x800E samples end up here!
    offset += samplesize;
    continue;
}

A previous fix already mapped 0x8006 (REC_SAMPLE_APOS5_COMPAT) → REC_SAMPLE for APOS5 firmware. But firmware 50211016 now uses 0x800E instead, which is not handled.

Solution

Check only higher bit of the sample (0x80)