Fix bug when mixed mode SMC yields zero forward or zero reverse passes

[SouthEndMusic]

Fixes #857

[codecov]

Codecov Report

❌ Patch coverage is 0% with 32 lines in your changes missing coverage. Please review.
✅ Project coverage is 29.58%. Comparing base (5257e7d) to head (33ad75f).

Files with missing lines	Patch %	Lines
...nterfaceSparseMatrixColoringsExt/jacobian_mixed.jl	0.00%	32 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (5257e7d) and HEAD (33ad75f). Click for more details.

HEAD has 170 uploads less than BASE

Flag	BASE (5257e7d)	HEAD (33ad75f)
DI	141	7
DIT	36	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #860       +/-   ##
===========================================
- Coverage   98.10%   29.58%   -68.53%     
===========================================
  Files         134      103       -31     
  Lines        7988     5598     -2390     
===========================================
- Hits         7837     1656     -6181     
- Misses        151     3942     +3791     

Flag	Coverage Δ
DI	29.58% <0.00%> (-69.22%)	⬇️
DIT	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.