NAME
miget_volume_valid_min - get the valid minimum value
SYNOPSIS
#include <minc2.h>
int miget_volume_valid_min ( mihandle_t volume,
double *valid_min)
DESCRIPTION
This method gets the valid minimum value specific to the data type.
RETURN VALUE
miget_volume_valid_min returns MI_NOERROR if it successfully gets
the valid minimum or MI_ERROR otherwise