Fix yet another cppcheck issue

Summary: It started failing to analyze our code after rABCf192773f33dd2a77fedbc7bbae39ca1efb74c496 for an unknown reason. Just ignore the issue. Tested with cppcheck 2.6.

Test Plan:

arc lint -- ./src/net_processing.cpp

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D10905