find: fix warnings from filter_next lint

[cakebaker]

This PR fixes two warnings from the filter_next lint that show up with Rust 1.92.0.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.76%. Comparing base (c5c5a16) to head (8a2abaa).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/find/matchers/printf.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #604      +/-   ##
==========================================
+ Coverage   91.74%   91.76%   +0.01%     
==========================================
  Files          31       31              
  Lines        6205     6203       -2     
  Branches      328      328              
==========================================
- Hits         5693     5692       -1     
+ Misses        391      390       -1     
  Partials      121      121              

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