fix MF hp estimation function. PEP8 stuff.
fix MF hp estimation function. PEP8 stuff.

LABSN/mnefun,ktavabi/mnefun,kambysese/mnefun,Eric89GXL/mnefun,ktavabi/mnefun,drammock/mnefun,drammock/mnefun,kambysese/mnefun,LABSN/mnefun,Eric89GXL/mnefun