[gtk+] Cast to fix compilation warning

[Javier Jardón <jjardon src gnome org>]

commit 852d4f49cd65c4a78791dfc781f504d6cbb9335c
Author: Javier Jardón <jjardon gnome org>
Date:   Wed Oct 21 23:53:01 2009 +0200

    Cast to fix compilation warning

 gdk-pixbuf/io-bmp.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk-pixbuf/io-bmp.c b/gdk-pixbuf/io-bmp.c
index 21300e4..e654d1f 100644
--- a/gdk-pixbuf/io-bmp.c
+++ b/gdk-pixbuf/io-bmp.c
@@ -1318,7 +1318,7 @@ gdk_pixbuf__bmp_image_save_to_callback (GdkPixbufSaveFunc   save_func,
 	put32 (dst, 0);			/* biClrUsed */
 	put32 (dst, 0);			/* biClrImportant */
 
-	if (!save_func (BFH_BIH, 14 + 40, error, user_data))
+	if (!save_func ((gchar *)BFH_BIH, 14 + 40, error, user_data))
 		return FALSE;
 
 	dst_line = buf = g_try_malloc (size);
@@ -1341,7 +1341,7 @@ gdk_pixbuf__bmp_image_save_to_callback (GdkPixbufSaveFunc   save_func,
 			dst[2] = src[0];
 		}
 	}
-	ret = save_func (buf, size, error, user_data);
+	ret = save_func ((gchar *)buf, size, error, user_data);
 	g_free (buf);
 
 	return ret;