api: fix handling of multiple conditions for buffering

[mloubout]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 45.20548% with 40 lines in your changes missing coverage. Please review.
✅ Project coverage is 45.22%. Comparing base (828497e) to head (4fd0296).

Files with missing lines	Patch %	Lines
tests/test_buffering.py	10.52%	17 Missing ⚠️
tests/test_interpolation.py	20.00%	8 Missing ⚠️
devito/ir/equations/equation.py	53.33%	6 Missing and 1 partial ⚠️
devito/types/relational.py	82.35%	3 Missing ⚠️
devito/passes/clusters/cse.py	60.00%	1 Missing and 1 partial ⚠️
devito/symbolics/extended_sympy.py	60.00%	2 Missing ⚠️
devito/passes/clusters/buffering.py	50.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (828497e) and HEAD (4fd0296). Click for more details.

HEAD has 8 uploads less than BASE

Flag	BASE (828497e)	HEAD (4fd0296)
	18	10

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2850       +/-   ##
===========================================
- Coverage   78.97%   45.22%   -33.75%     
===========================================
  Files         248      248               
  Lines       50936    50997       +61     
  Branches     4404     4412        +8     
===========================================
- Hits        40226    23064    -17162     
- Misses       9909    27004    +17095     
- Partials      801      929      +128     

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