[gimp] libgimpcolor: add shortcut in gimp_color_profile_is_equal()

[N/A <ell src gnome org>]

commit 22a28a23cc39a5f5da2d1d49c64961dc123925b5
Author: Ell <ell_se yahoo com>
Date:   Fri Nov 3 03:11:47 2017 -0400

    libgimpcolor: add shortcut in gimp_color_profile_is_equal()
    
    When the two pointers are equal, return TRUE immediately, instead
    of comparing the profile to itself.

 libgimpcolor/gimpcolorprofile.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/libgimpcolor/gimpcolorprofile.c b/libgimpcolor/gimpcolorprofile.c
index 8746d47..4015296 100644
--- a/libgimpcolor/gimpcolorprofile.c
+++ b/libgimpcolor/gimpcolorprofile.c
@@ -667,9 +667,10 @@ gimp_color_profile_is_equal (GimpColorProfile *profile1,
   const gsize header_len = sizeof (cmsICCHeader);
 
   g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile1), FALSE);
-  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile1), FALSE);
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile2), FALSE);
 
-  return (profile1->priv->length == profile2->priv->length &&
+  return profile1 == profile2                              ||
+         (profile1->priv->length == profile2->priv->length &&
           memcmp (profile1->priv->data + header_len,
                   profile2->priv->data + header_len,
                   profile1->priv->length - header_len) == 0);