Use hex character constants for char values
Use hex character constants for char values

Avoids "warning: implicit conversion from 'int' to 'const char'
changes value [from 139 to -117 etc]" with recent Clang.

jmarshall/bedtools2,jmarshall/bedtools2,arq5x/bedtools2,arq5x/bedtools2,arq5x/bedtools2,arq5x/bedtools2,jmarshall/bedtools2,arq5x/bedtools2,jmarshall/bedtools2,jmarshall/bedtools2