[gnome-color-manager] trivial: Fix a small compile warning

[Richard Hughes <rhughes src gnome org>]

commit 18d192ad31f9ce77debb4236e12d4fc31a4f76b3
Author: Richard Hughes <richard hughsie com>
Date:   Sun Oct 12 10:44:18 2014 +0100

    trivial: Fix a small compile warning

 src/gcm-utils.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gcm-utils.c b/src/gcm-utils.c
index d2ce95b..6efc89e 100644
--- a/src/gcm-utils.c
+++ b/src/gcm-utils.c
@@ -375,7 +375,7 @@ gcm_utils_image_convert (GtkImage *image,
                         GError **error)
 {
        CdPixelFormat pixel_format;
-       CdTransform *transform;
+       CdTransform *transform = NULL;
        GdkPixbuf *pixbuf;
        GdkPixbuf *original_pixbuf;
        gboolean ret = TRUE;