Fix the PORT_ALLOC failure of save_compatibility_test.

[iphydf]

tox_new_log has a much larger range of ports it can select from.

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This change is 

[e0ff]

Reviewed 1 of 1 files at r1.
Reviewable status: 0 of 1 approvals obtained (waiting on @endoffile78)

[codecov]

Codecov Report

Merging #1124 into master will decrease coverage by 0.2%.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           master   #1124     +/-   ##
========================================
- Coverage    82.7%   82.4%   -0.3%     
========================================
  Files          80      80             
  Lines       14341   14342      +1     
========================================
- Hits        11861   11829     -32     
- Misses       2480    2513     +33

Impacted Files	Coverage Δ
auto_tests/save_compatibility_test.c	88.3% <100%> (+0.1%)	⬆️
toxcore/logger.c	88.8% <0%> (-5.6%)	⬇️
toxav/audio.c	65.7% <0%> (-4.4%)	⬇️
toxcore/network.c	83.4% <0%> (-1.5%)	⬇️
toxav/msi.c	65.6% <0%> (-1.2%)	⬇️
toxcore/tox.c	65.7% <0%> (-1%)	⬇️
toxcore/friend_connection.c	93.6% <0%> (-0.9%)	⬇️
toxcore/Messenger.c	85.7% <0%> (-0.6%)	⬇️
toxav/toxav.c	68.1% <0%> (-0.5%)	⬇️
toxcore/onion_client.c	95% <0%> (-0.2%)	⬇️
... and 2 more

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