[gimp] plug-ins: add G_GNUC_PRINTF() to the tiff warning/error functions

[Michael Natterer <mitch src gnome org>]

commit 09c8e0cd78ec1d050ed8499afe4824832659a1ae
Author: Michael Natterer <mitch gimp org>
Date:   Wed Jan 1 19:54:20 2014 +0100

    plug-ins: add G_GNUC_PRINTF() to the tiff warning/error functions

 plug-ins/common/file-tiff-load.c |    4 ++--
 plug-ins/common/file-tiff-save.c |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/plug-ins/common/file-tiff-load.c b/plug-ins/common/file-tiff-load.c
index 5a694b0..b30ee77 100644
--- a/plug-ins/common/file-tiff-load.c
+++ b/plug-ins/common/file-tiff-load.c
@@ -134,10 +134,10 @@ static void      load_paths       (TIFF         *tif,
 
 static void      tiff_warning  (const gchar  *module,
                                 const gchar  *fmt,
-                                va_list       ap);
+                                va_list       ap) G_GNUC_PRINTF (2, 0);
 static void      tiff_error    (const gchar  *module,
                                 const gchar  *fmt,
-                                va_list       ap);
+                                va_list       ap) G_GNUC_PRINTF (2, 0);
 static TIFF     *tiff_open     (const gchar  *filename,
                                 const gchar  *mode,
                                 GError      **error);
diff --git a/plug-ins/common/file-tiff-save.c b/plug-ins/common/file-tiff-save.c
index 3b0c4a8..fab5120 100644
--- a/plug-ins/common/file-tiff-save.c
+++ b/plug-ins/common/file-tiff-save.c
@@ -130,10 +130,10 @@ static void      byte2bit               (const guchar *byteline,
 
 static void      tiff_warning           (const gchar *module,
                                          const gchar *fmt,
-                                         va_list      ap);
+                                         va_list      ap) G_GNUC_PRINTF (2, 0);
 static void      tiff_error             (const gchar *module,
                                          const gchar *fmt,
-                                         va_list      ap);
+                                         va_list      ap) G_GNUC_PRINTF (2, 0);
 static TIFF     *tiff_open              (const gchar *filename,
                                          const gchar *mode,
                                          GError     **error);