fix(BudgetTerm.f90): ensure that the size of an array is >0 before deallocating #3622

Job	Run time
Build	1m 51s
Check format	1m 51s
Smoke test	5m 51s
Test Intel fortran (ubuntu-22.04)	40m 21s
Test GNU fortran (macos-13, false)	25m 7s
Test Intel fortran (macos-13)	33m 10s
Extended testing (ubuntu-22.04)	18m 19s
Extended testing (macos-13)	45m 9s
Extended testing (windows-2022)	1h 45m 15s
Test GNU fortran (macos-14, false)	19m 18s
Test Intel fortran (windows-2022)	36m 0s
Test GNU fortran (macos-14, true)	29m 23s
Test GNU fortran (ubuntu-22.04, false)	21m 39s
Test GNU fortran (ubuntu-22.04, true)	13m 57s
Test GNU fortran (windows-2022, false)	6h 0m 25s
	12h 37m 36s

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