Fixed log likelihood for normal HMM so it doesn't crash.
Fixed log likelihood for normal HMM so it doesn't crash.

wgmueller1/pyhsmm,wgmueller1/pyhsmm,fivejjs/pyhsmm,fivejjs/pyhsmm,fivejjs/pyhsmm,theDataGeek/pyhsmm,theDataGeek/pyhsmm,bikash/pyhsmm,bikash/pyhsmm,theDataGeek/pyhsmm,wgmueller1/pyhsmm,wgmueller1/pyhsmm,fivejjs/pyhsmm,mattjj/pyhsmm,wgmueller1/pyhsmm,theDataGeek/pyhsmm,theDataGeek/pyhsmm,bikash/pyhsmm,mattjj/pyhsmm,fivejjs/pyhsmm