fixes #1675 undefined behavior in posix ipc_dialer_dial

[gdamore]

(This also affects TCP, and fixed there.)

fixes #

Note that the above format should be used in your git commit comments.
You agree that by submitting a PR, you have read and agreed to our
contributing guidelines.

[codecov]

Codecov Report

Merging #1692 (7ff70b6) into master (12002c9) will increase coverage by 1.10%.
Report is 1 commits behind head on master.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1692      +/-   ##
==========================================
+ Coverage   78.15%   79.26%   +1.10%     
==========================================
  Files          87       89       +2     
  Lines       19390    20224     +834     
==========================================
+ Hits        15155    16031     +876     
+ Misses       4235     4193      -42     

Files Changed	Coverage Δ
src/platform/posix/posix_ipcdial.c	56.87% <0.00%> (+0.49%)	⬆️
src/platform/posix/posix_tcpdial.c	75.72% <0.00%> (+9.39%)	⬆️

... and 80 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more