backport for fixing FTBFS error
This PR's patch for fixing FTBFS error on Debian unstable
- Replace Calloc() and Free() with R_Calloc() and R_Free(). upstream commid:https://code.bioconductor.org/browse/groHMM/commit/5752698373578e1575918a8d4ac71508d296fbc2
- Replace 'false' with 'false_value'.(basically, there're lots of del spaces) upstream commit:https://code.bioconductor.org/browse/groHMM/commit/261791bdd2802badced2ba6dc1f0bdddd07a85df