small modification to avoid compiler warning "assuming signed overflow does not occur when assuming that (X + c) < X is always false"
small modification to avoid compiler warning "assuming signed overflow does not occur when assuming that (X + c) < X is always false"

kedingagnumerikunimarburg/Marburg_Software_Library,wavelet-and-multiscale-library/Marburg_Software_Library,wavelet-and-multiscale-library/Marburg_Software_Library,agnumerikunimarburg/Marburg_Software_Library