Fix new lints from Rust nightly

[shssoichiro]

Fixes instances of lints for:

• unstable_name_collisions (due to addition of unstable ilog method)
• clippy::partialeq_to_none
• clippy::needless_borrow

[codecov-commenter]

Codecov Report

Base: 86.38% // Head: 86.42% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (0183ec4) compared to base (75fcd60).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3006      +/-   ##
==========================================
+ Coverage   86.38%   86.42%   +0.04%     
==========================================
  Files          89       89              
  Lines       34071    34069       -2     
==========================================
+ Hits        29432    29445      +13     
+ Misses       4639     4624      -15     

Impacted Files	Coverage Δ
src/activity.rs	98.95% <100.00%> (ø)
src/deblock.rs	94.90% <100.00%> (-0.01%)	⬇️
src/ec.rs	83.51% <100.00%> (ø)
src/encoder.rs	87.16% <100.00%> (+0.03%)	⬆️
src/me.rs	95.59% <100.00%> (ø)
src/rdo.rs	85.76% <100.00%> (+0.46%)	⬆️
src/transform/inverse.rs	99.67% <100.00%> (ø)
src/transform/mod.rs	89.70% <100.00%> (ø)
src/context/frame_header.rs	66.06% <0.00%> (-2.27%)	⬇️
src/context/partition_unit.rs	88.33% <0.00%> (-0.28%)	⬇️
... and 5 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.