Bug#4266: gs prints debugging info when invoked from xdvi

[Carlos Fonseca <fonseca@gaivota.demon.co.uk>]

Package: gs
Version: 4.01-2

When called from xdvi, gs works as expected, but prints the
following (debugging?) messages:

gs: Error: /undefinedfilename in --file--
gs: Operand stack:
gs:    (./Fontmap)   (r)
gs: Execution stack:
gs:    %interp_exit   --nostringval--   --nostringval--   --nostringval--
--nostrin
gs: gval--   0   --nostringval--   %array_continue   --nostringval--
--nostringval-
gs: -   false   --nostringval--   --nostringval--
gs: Dictionary stack:
gs:    --dict:678/701--   --dict:0/20--   --dict:47/200--
--dict:678/701--
gs: Current allocation mode is global
gs: Current file position is 29607

This does not happen when invoking gs from the command line. 

Carlos