NAME
miget_volume_max - get the global max scale for volume
SYNOPSIS
#include <minc2.h>
int miget_volume_max ( mihandle_t volume,
double *volume_max)
DESCRIPTION
This method gets the max scale value for the volume. Note that this
method only works if volume is not slice scaled.
RETURN VALUE
miget_volume_max returns MI_NOERROR if it successfully gets the
global max scale for the volume or MI_ERROR otherwise.