unsignedPositive
ftp://ftp.de.debian.org/debian/pool/main/b/bowtie2/bowtie2_2.5.5.orig.tar.gz
2.20.0 bowtie2-2.5.5/pat.cpp:469:2: style: Unsigned expression 'nread' can't be negative so it is unnecessary to test it. [unsignedPositive]