Tiny tweak to error message when bamToFastq doesn't get a bam file
Tiny tweak to error message when bamToFastq doesn't get a bam file

Before this commit the bamToFastq utility produced an error message
asking for '-bam' when no bam file was provided, this commit matches
the error message to the required argument (-i)

arq5x/bedtools2,arq5x/bedtools2,arq5x/bedtools2,arq5x/bedtools2,arq5x/bedtools2