Update tool-mei2hum.cpp
Update tool-mei2hum.cpp

Fixed typo
craigsapp/humlib,craigsapp/minHumdrum,humdrum-tools/minHumdrum,craigsapp/humlib,humdrum-tools/minHumdrum,craigsapp/minHumdrum,humdrum-tools/minHumdrum,craigsapp/minHumdrum,craigsapp/humlib