[gimp] plug-ins: forgot to look missing font duplicates recursively.

[Jehan <jehanp src gnome org>]

commit 34f05750d08c152408434c440c3cb4570f355a49
Author: Jehan <jehan girinstud io>
Date:   Wed Jan 1 18:28:04 2020 +0100

    plug-ins: forgot to look missing font duplicates recursively.
    
    Fix for the previous commit, fixes cases with text layers inside groups.

 plug-ins/common/file-pdf-save.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/common/file-pdf-save.c b/plug-ins/common/file-pdf-save.c
index 088c4fa81e..4f079a1dd3 100644
--- a/plug-ins/common/file-pdf-save.c
+++ b/plug-ins/common/file-pdf-save.c
@@ -653,8 +653,20 @@ get_missing_fonts (GList *layers)
 
       if (gimp_item_is_group (GIMP_ITEM (layer)))
         {
-          missing_fonts = g_list_concat (missing_fonts,
-                                         get_missing_fonts (gimp_item_list_children (GIMP_ITEM (layer))));
+          GList *child_missing_fonts;
+          GList *iter2;
+
+          child_missing_fonts = get_missing_fonts (gimp_item_list_children (GIMP_ITEM (layer)));
+          for (iter2 = child_missing_fonts; iter2; iter2 = iter2->next)
+            {
+              gchar *missing = iter2->data;
+
+              if (g_list_find_custom (missing_fonts, missing, (GCompareFunc) g_strcmp0) == NULL)
+                missing_fonts = g_list_prepend (missing_fonts, missing);
+              else
+                g_free (missing);
+            }
+          g_list_free (child_missing_fonts);
         }
       else if (gimp_item_is_text_layer (GIMP_ITEM (layer)))
         {