Possible fix for #914 compactCells failing when passed all res 1 cells #1479

Job	Run time
Coverage	3m 35s
CMake correctness checks	5s
Test Compile clang Debug	3m 32s
Test Compile clang Release	2m 38s
Test Compile gcc Debug	3m 31s
Test Valgrind	11m 10s
Test Compile clang Debug -fsanitize=undefined,float-divide-by-zero -fno-sanitize-recover=undefined,float-divide-by-zero	6m 16s
Test Compile gcc Release	2m 22s
Test Compile clang Release -fsanitize=undefined,float-divide-by-zero -fno-sanitize-recover=undefined,float-divide-by-zero	2m 59s
Test Compile clang Debug -fsanitize=memory -fno-sanitize-recover=memory	29m 10s
Test Compile clang Release -fsanitize=memory -fno-sanitize-recover=memory	5m 38s
Test Compile clang Debug -fsanitize=address -fno-sanitize-recover=address	5m 28s
Test Compile clang Release -fsanitize=address -fno-sanitize-recover=address	3m 17s
	1h 19m 41s

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