[gimp] plug-ins: fix warning on JavaScript goat exercise.

[Jehan <jehanp src gnome org>]

commit 49640ebfeea118e4919667d7c5d45320044c9186
Author: Jehan <jehan girinstud io>
Date:   Tue Sep 10 16:06:48 2019 +0200

    plug-ins: fix warning on JavaScript goat exercise.
    
    The exact warning was:
    > (goat-exercise-gjs:26895): Gjs-WARNING **: 15:59:18.382: Some code
    > called array.toString() on a Uint8Array instance. Previously this
    > would have interpreted the bytes of the array as a string, but that is
    > nonstandard. In the future this will return the bytes as
    > comma-separated digits. For the time being, the old behavior has been
    > preserved, but please fix your code anyway to explicitly call
    > ByteArray.toString(array).  (Note that array.toString() may have been
    > called implicitly.)

 plug-ins/goat-exercises/goat-exercise-gjs.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plug-ins/goat-exercises/goat-exercise-gjs.js b/plug-ins/goat-exercises/goat-exercise-gjs.js
index 991441352c..1210bd5119 100755
--- a/plug-ins/goat-exercises/goat-exercise-gjs.js
+++ b/plug-ins/goat-exercises/goat-exercise-gjs.js
@@ -106,7 +106,7 @@ var Goat = GObject.registerClass({
             box.pack_start(label, false, false, 1);
             label.show();
 
-            let contents = String(GLib.file_get_contents(System.programInvocationName)[1]);
+            let contents = 
imports.byteArray.toString(GLib.file_get_contents(System.programInvocationName)[1]);
             if (contents) {
                 let scrolled = new Gtk.ScrolledWindow();
                 scrolled.set_vexpand (true);