bndlib: Remove recursion in macro warning
bndlib: Remove recursion in macro warning

This recursion caused out of memory errors.

Fixes https://github.com/bndtools/bnd/issues/724

Helped-by: e282e0d2ac315f88f5c48181efdd1a78c6da9ebe@akuhtz
Signed-off-by: BJ Hargrave <3d26bb3930946e3370762d769a073cece444c2d8@bjhargrave.com>

mcculls/bnd,lostiniceland/bnd,magnet/bnd,magnet/bnd,xtracoder/bnd,GEBIT/bnd,mcculls/bnd,GEBIT/bnd,psoreide/bnd,mcculls/bnd,psoreide/bnd,lostiniceland/bnd,psoreide/bnd,xtracoder/bnd,joansmith/bnd,magnet/bnd,lostiniceland/bnd,joansmith/bnd