36555983f0
This is to conform to man/gif2webp.1 Earlier, one needed to give both '-kmin 0' and '-kmax 0' for this to work. Also, suppress further warnings for kmin = 0 and/or kmax = 0 case. Change-Id: I6f5eeb609aeffc159d0252a40a5734162f7e4e7d