Bug#455645: evince: Should depend on ghostscript-x

[Kevin Locke]

I believe it should (also or instead) depend on ghostscript-x.
Without the -x package evince appears unable to render PostScript
documents.  When opening a PostScript document without the
ghostscript-x package installed, evince displays blank pages and the
"Loading..." text and prints the following messages:

-8<-----------------------------------------------------------------
** (evince:10264): WARNING **: Interpreter failed.
Unknown device: x11alpha
Unrecoverable error: undefined in .uninstallpagedevice
Operand stack:
    defaultdevice

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe
Unknown device: x11alpha

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe

** (evince:10264): WARNING **: Interpreter failed.

(evince:10264): GLib-WARNING **: Error flushing string: Broken pipe
-8<-----------------------------------------------------------------

With the ghostscript-x package, the document displays correctly and no
error messages are printed.

Cheers,
Kevin