Close file in read_bjg_header after reading the header

[stevevanhooser]

Summary

ndr.format.bjg.read_bjg_header opened the BJG .bin file to read its 4096-byte header but never called fclose, leaking one file descriptor per call.

ndr.reader.bjg calls this function from t0_t1, getchannelsepoch, samplerate and readchannels_epochsamples (and ndr.format.bjg.read calls it too). Reading a long recording in segments (for example NDI's ingest, which reads 1e6-sample segments) therefore leaks a handle per segment and can exhaust the per-process open-file limit (256 by default on macOS). After that, later file opens fail.

Change

Adds fclose(fid) right after the header fread. Nothing after that line uses fid, so closing early also covers the later error(...) paths in the parser.

Testing

Not run: no MATLAB environment was available. Suggested check: call ndr.format.bjg.read_bjg_header on a BJG file in a loop and confirm numel(fopen('all')) stays at 0.

🤖 Generated with Claude Code

https://claude.ai/code/session_01PuiCWsNMWhTwwN3PrnGTw8

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Generated by Claude Code

[github-actions]

Test Results

366 tests  ±0   363 ✅ ±0   36s ⏱️ ±0s
 49 suites ±0     3 💤 ±0 
  1 files   ±0     0 ❌ ±0 

Results for commit 10118a3. ± Comparison against base commit 95b7e2d.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 53.25%. Comparing base (95b7e2d) to head (10118a3).

Files with missing lines	Patch %	Lines
+ndr/+format/+bjg/read_bjg_header.m	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #141      +/-   ##
==========================================
- Coverage   53.26%   53.25%   -0.01%     
==========================================
  Files         160      160              
  Lines        9190     9191       +1     
==========================================
  Hits         4895     4895              
- Misses       4295     4296       +1     

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