isguirunning versus __octave_link_enabled__

[Rik]

2/18/15

The scripts which create a dialog window have a different behavior
depending on whether the GUI is running (Qt available) or whether the CLI
is running.  Currently the m-files in the scripts/gui directory check for
this with

if (__octave_link_enabled__ ())
 #GUI Code
else
 #CLI Code
endif

The intent of the code would be clearer, I think, if we substituted the
isguirunning() function for __octave_link_enabled__.  Does anyone have a
reason why this shouldn't be done?

--Rik