undid erroneous precision-dependent procedure names for C interfaces … #188

Job	Run time
CUTEst/ubuntu-latest/gcc-v12	1m 15s
CUTEst/macos-latest/gcc-v12	1m 20s
CUTEst/ubuntu-latest/intel-classic-v2021.10	3m 25s
CUTEst/macos-latest/intel-classic-v2021.10	8m 1s
	14m 1s

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