Fix suspending with CTRL-Z on DragonFlyBSD

[ichizok]

No description provided.

[codecov]

Codecov Report

Merging #9943 (f59fd13) into master (badf04f) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #9943   +/-   ##
=======================================
  Coverage   81.89%   81.90%           
=======================================
  Files         167      167           
  Lines      187074   187075    +1     
  Branches    42161    42161           
=======================================
+ Hits       153210   153215    +5     
+ Misses      21518    21516    -2     
+ Partials    12346    12344    -2     

Flag	Coverage Δ
huge-clang-none	82.29% <ø> (-0.01%)	⬇️
huge-gcc-none	82.63% <ø> (-0.01%)	⬇️
huge-gcc-testgui	81.11% <ø> (+<0.01%)	⬆️
huge-gcc-unittests	2.01% <ø> (-0.01%)	⬇️
linux	83.88% <ø> (+<0.01%)	⬆️
mingw-x64-HUGE	0.00% <ø> (ø)
mingw-x64-HUGE-gui	77.15% <ø> (-0.01%)	⬇️
windows	75.93% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/os_unix.c	68.91% <ø> (+0.25%)	⬆️
src/terminal.c	78.09% <0.00%> (-0.30%)	⬇️
src/message.c	81.27% <0.00%> (-0.24%)	⬇️
src/netbeans.c	72.96% <0.00%> (-0.15%)	⬇️
src/gui.c	74.03% <0.00%> (-0.05%)	⬇️
src/os_win32.c	57.05% <0.00%> (-0.04%)	⬇️
src/mouse.c	80.10% <0.00%> (-0.02%)	⬇️
src/eval.c	91.97% <0.00%> (ø)
src/version.c	84.16% <0.00%> (ø)
src/vim9compile.c	93.00% <0.00%> (+<0.01%)	⬆️
... and 8 more

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