ROUTINE
-------

INT_ ug_io_find_file (char Case_Name[],
                      char File_Name[],
                      INT_ File_Data_Type_)

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

Find file name of an existing (and readable) standard UG file with given case
name and data type.

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

Case_Name                : File case name with leading path if necessary.

File_Data_Type_          : File data type flag.
                           The numeric values associated with each file data
                           type are defined in the include file,
                           "UG_IO_File_Def.h".

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

0                        : An existing file was found.
<0                       : No existing file was found.
                           The return value will be between -600 and -699.

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

Case_Name                : File case name. If Case_Name has a trailing dot,
                           ".", then the dot will be ignored and removed on
                           output.

File_Name                : File name with file format suffix, file type suffix,
                           and file compression suffix.
                           This will not be set if a file was not found.
