Single End Read run crashes

[CDieterich]

reason : mate1 and mate2 are not available in single end mode

if options.bam and (len(options.bam) != len(options.mate1)):
logging.info("BAM file list is shorter than mate list. Maybe you forgot the @ (@file.list)?")
print("BAM file list is shorter than mate list. Maybe you forgot the @ (@file.list)?")
exit(-1)