signConversionCond
ftp://ftp.de.debian.org/debian/pool/main/libg/libgdiplus/libgdiplus_6.1+dfsg.orig.tar.xz
2.18.0 libgdiplus-6.1+dfsg/src/bitmap.c:2461:58: warning: Expression 'num_colors-1' can have a negative value. That is converted to an unsigned value and used in an unsigned calculation. [signConversionCond]
ftp://ftp.de.debian.org/debian/pool/main/l/lives/lives_3.0.2.orig.tar.bz2
2.18.0 lives-3.0.2/src/effects.c:999:23: warning: Expression 'key' can have a negative value. That is converted to an unsigned value and used in an unsigned calculation. [signConversionCond]