test_file_delete is failing on EL7 x86_64

[opoplawski]

96: Test command: /export/home/orion/fedora/gdl/gdl-0.9.8/build/testsuite/launchtest "test_file_delete.pro"
96: Test timeout computed to be: 9.99988e+06
96: % Compiled module: TEST_FILE_DELETE.
96: % Compiled module: ESCAPE_SPECIAL_CHAR.
96: % Compiled module: FILE_DELETE.
96: % TEST_FILE_DELETE: files1 >>$chops &up str*ings.<<has not been deleted
 3/13 Test  #96: test_file_delete.pro .............***Failed    0.36 sec

[GillesDuvert]

IDL> test_file_delete
% Compiled module: TEST_FILE_DELETE.
% Variable is undefined: ESCAPE_SPECIAL_CHAR.
% Execution halted at: TEST_FILE_DELETE 54 /home/gildas/gdl/testsuite/test_file_delete.pro
% $MAIN$