ROUTINE
-------

INT_ ug_getline (char **Line,
                 FILE *File_Stream)

DESCRIPTION
-----------

Read one line of a file stream and store the line in a string and allocate space
for the string.

INPUT ARGUMENTS
---------------

File_Stream       : File stream for an ASCII file open for reading.

OUTPUT ARGUMENTS
----------------

Line              : Pointer to character string containing line read.

RETURN VALUE
------------

0                 : Line was read and character string containing it was set
                    successfully.
>400              : An error occurred reading the file or allocating space for
                    the character string.
