[gimp] plug-ins: check GError domain and code, not the message.

[Jehan Pagès <jehanp src gnome org>]

commit 0f2002c9489c6617bb28c706abb06c7c5ebfcfcb
Author: Jehan <jehan girinstud io>
Date:   Sun Sep 10 22:53:47 2017 +0200

    plug-ins: check GError domain and code, not the message.
    
    When there is a well-documented GError domain/code, use these,
    especially since messages can be localized (not sure if that is the case
    for this one, but theoretically it could) and change over time.
    
    Also remove the "nice-to-have" comment on file-pdf-load since we won't
    be changing it now, but leave it on file-pdf-load2 parameters which can
    still change before 2.10.

 plug-ins/common/file-pdf-load.c |   10 +++-------
 1 files changed, 3 insertions(+), 7 deletions(-)
---
diff --git a/plug-ins/common/file-pdf-load.c b/plug-ins/common/file-pdf-load.c
index 12420c5..22a79d1 100644
--- a/plug-ins/common/file-pdf-load.c
+++ b/plug-ins/common/file-pdf-load.c
@@ -265,12 +265,6 @@ query (void)
     { GIMP_PDB_INT32,     "run-mode",     "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }"     
},
     { GIMP_PDB_STRING,    "filename",     "The name of the file to load"     },
     { GIMP_PDB_STRING,    "raw-filename", "The name entered"                 }
-    /* XXX: Nice to have API at some point, but needs work
-    { GIMP_PDB_INT32,     "resolution",   "Resolution to rasterize to (dpi)" },
-    { GIMP_PDB_INT32,     "antialiasing", "Use anti-aliasing" },
-    { GIMP_PDB_INT32,     "n-pages",      "Number of pages to load (0 for all)" },
-    { GIMP_PDB_INT32ARRAY,"pages",        "The pages to load"                }
-    */
   };
 
   static const GimpParamDef load2_args[] =
@@ -633,7 +627,9 @@ open_document (const gchar  *filename,
       GtkWidget *label;
 
       label = gtk_label_new (_("PDF is password protected, please input the password:"));
-      while (error && strcmp (error->message, "Document is encrypted") == 0)
+      while (error                          &&
+             error->domain == POPPLER_ERROR &&
+             error->code == POPPLER_ERROR_ENCRYPTED)
         {
           GtkWidget *vbox;
           GtkWidget *dialog;