[gthumb] build failure on x32: printf("%ld", time_t) warnings with -Werror

[Paolo Bacchilega <paobac src gnome org>]

commit ed219c771bc0c63e1a7847e44c81f43223454eac
Author: kilobyte <kilobyte angband pl>
Date:   Tue Mar 10 08:29:46 2015 +0100

    build failure on x32: printf("%ld", time_t) warnings with -Werror

 gthumb/gnome-desktop-thumbnail.c |    4 ++--
 gthumb/main-migrate-catalogs.c   |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gthumb/gnome-desktop-thumbnail.c b/gthumb/gnome-desktop-thumbnail.c
index 2356bf5..14d1eee 100644
--- a/gthumb/gnome-desktop-thumbnail.c
+++ b/gthumb/gnome-desktop-thumbnail.c
@@ -1370,7 +1370,7 @@ gnome_desktop_thumbnail_factory_save_thumbnail (GnomeDesktopThumbnailFactory *fa
     }
   close (tmp_fd);
 
-  g_snprintf (mtime_str, 21, "%ld",  original_mtime);
+  g_snprintf (mtime_str, 21, "%ld",  (long) original_mtime);
   width = gdk_pixbuf_get_option (thumbnail, "tEXt::Thumb::Image::Width");
   height = gdk_pixbuf_get_option (thumbnail, "tEXt::Thumb::Image::Height");
 
@@ -1471,7 +1471,7 @@ gnome_desktop_thumbnail_factory_create_failed_thumbnail (GnomeDesktopThumbnailFa
     }
   close (tmp_fd);
 
-  g_snprintf (mtime_str, 21, "%ld",  mtime);
+  g_snprintf (mtime_str, 21, "%ld",  (long) mtime);
   pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
   saved_ok  = gdk_pixbuf_save (pixbuf,
                               tmp_path,
diff --git a/gthumb/main-migrate-catalogs.c b/gthumb/main-migrate-catalogs.c
index 1c28fca..e823d6e 100644
--- a/gthumb/main-migrate-catalogs.c
+++ b/gthumb/main-migrate-catalogs.c
@@ -171,7 +171,7 @@ migration_for_each_file (GFile     *file,
                                gboolean    b;
                                int         line_ofs;
                                /*gboolean    all_keywords;*/
-                               time_t      date;
+                               long        date;
                                int         date_scope;
 
                                extension = ".search";