Modernize DECREF (part 4).

[1uc]

Needs rebasing, but conflicts with part 3.

[codecov]

Codecov Report

Attention: Patch coverage is 96.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 67.07%. Comparing base (f323bc8) to head (f8a396f).

Files with missing lines	Patch %	Lines
src/nrnpython/nrnpy_p2h.cpp	96.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3208   +/-   ##
=======================================
  Coverage   67.06%   67.07%           
=======================================
  Files         569      569           
  Lines      111204   111190   -14     
=======================================
- Hits        74583    74579    -4     
+ Misses      36621    36611   -10     

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[azure-pipelines]

✔️ 42cd898 -> Azure artifacts URL

[sonarcloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[azure-pipelines]

✔️ f8a396f -> Azure artifacts URL

[bbpbuildbot]

Logfiles from GitLab pipeline #238488 (:white_check_mark:) have been uploaded here!

Status and direct links:

• ✅ mac_m1_cmake_build: [cmake, ON, OFF, OFF, address]
• ✅ spack_setup
• ✅ build:nmodl
• ✅ build:neuron:nmodl:intel:legacy
• ✅ build:neuron:nmodl:intel:shared
• ✅ build:neuron:nmodl:nvhpc:acc:legacy
• ✅ build:neuron:nmodl:nvhpc:acc:shared
• ✅ build:neuron:nmodl:nvhpc:omp:legacy
• ✅ build:neuron:nmodl:nvhpc:omp
• ✅ test:neuron:nmodl:intel:legacy
• ✅ test:neuron:nmodl:intel:shared
• ✅ test:neuron:nmodl:nvhpc:acc:legacy
• ✅ test:neuron:nmodl:nvhpc:acc:shared
• ✅ test:neuron:nmodl:nvhpc:omp:legacy
• ✅ test:neuron:nmodl:nvhpc:omp