webrtc: fix crash in case of errors during PATCH (#2609)

[aler9]

Fixes #2609

[codecov]

Codecov Report

Merging #2613 (43625cc) into main (4b4d57f) will decrease coverage by 0.02%.
Report is 2 commits behind head on main.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #2613      +/-   ##
==========================================
- Coverage   60.02%   60.00%   -0.02%     
==========================================
  Files         145      145              
  Lines       15531    15536       +5     
==========================================
  Hits         9322     9322              
- Misses       5569     5572       +3     
- Partials      640      642       +2     

Files	Coverage Δ
internal/core/webrtc_http_server.go	69.45% <0.00%> (ø)

... and 4 files with indirect coverage changes

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[github-actions]

This issue is mentioned in release v1.3.0 🚀
Check out the entire changelog by clicking here