guessSeqLengths should return a vector, not an array

[charles-plessy]

.guessSeqLengths <- function(gb) {
   zz <- guessSeqLengths(gb)
   zzz <- as.vector(zz)
   names(zzz) <- dimnames(zz)
   zzz
 }

Some functions, like tileGenome, strictly request vector input…