NAME
miget_attr_length - get the length of an attribute
SYNOPSIS
#include <minc2.h>
int miget_attr_length ( mihandle_t volume,
const char *path,
const char *name,
int *length )
DESCRIPTION
This method gets the length of the given attribute name.
RETURN VALUE
miget_attr_length returns MI_NOERROR if it successfully gets the
the dimension of a given attribute name or MI_ERROR otherwise