[gimp] app: print to standard error output when procedure uses deprecated…

[Jehan <jehanp src gnome org>]

commit 0b750eca6fa90aa6b1c2b3eb6e0fc82eb96f1b70
Author: Jehan <jehan girinstud io>
Date:   Tue Apr 20 17:43:53 2021 +0200

    app: print to standard error output when procedure uses deprecated…
    
    … single drawable run() function.
    All Scheme scripts use a single drawable and I am not so sure where to
    change this (or rather I hope someone will handle this rather than I).
    So let's not output a warning which would result into a stacktrace,
    blocking the GUI for a second or 2 and displaying an annoying popup each
    time. Let's just output to stderr for now until we get into a better
    state.

 app/actions/procedure-commands.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/actions/procedure-commands.c b/app/actions/procedure-commands.c
index 5a0a745730..16974493e9 100644
--- a/app/actions/procedure-commands.c
+++ b/app/actions/procedure-commands.c
@@ -254,8 +254,8 @@ procedure_commands_get_display_args (GimpProcedure *procedure,
             {
               if (drawables_list)
                 {
-                  g_warning ("%s: plug-in procedures expecting a single drawable are deprecated!",
-                             G_STRFUNC);
+                  g_printerr ("%s: plug-in procedures expecting a single drawable are deprecated!\n",
+                              G_STRFUNC);
                   g_value_set_object (gimp_value_array_index (args, n_args),
                                       drawables_list->data);
                   n_args++;