Fix libmisc_tools building

[zugz]

Sorry for the bug...

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This change is 

[CLAassistant]

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[codecov]

Codecov Report

Merging #1106 into master will increase coverage by 0.2%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #1106     +/-   ##
=========================================
+ Coverage   82.46%   82.66%   +0.2%     
=========================================
  Files          80       80             
  Lines       14316    14316             
=========================================
+ Hits        11805    11834     +29     
+ Misses       2511     2482     -29

Impacted Files	Coverage Δ
testing/misc_tools.c	55.17% <ø> (ø)	⬆️
toxcore/onion_client.c	95.35% <0%> (+0.3%)	⬆️
toxcore/friend_connection.c	95.7% <0%> (+1.14%)	⬆️
toxav/msi.c	66.75% <0%> (+1.67%)	⬆️
toxav/toxav.c	69.64% <0%> (+1.78%)	⬆️
auto_tests/set_name_test.c	100% <0%> (+6.38%)	⬆️
toxcore/crypto_core_test.cc	100% <0%> (+10%)	⬆️

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[iphydf]

Still LGTM.