[gimp] app: always use an RGB format as source format for display color management

[Michael Natterer <mitch src gnome org>]

commit 5cdbf6ae33922d6154d5655962061f93676526b3
Author: Michael Natterer <mitch gimp org>
Date:   Fri Jun 12 20:15:19 2015 +0200

    app: always use an RGB format as source format for display color management

 app/display/gimpdisplayshell-profile.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/app/display/gimpdisplayshell-profile.c b/app/display/gimpdisplayshell-profile.c
index 5b377d1..699e9dc 100644
--- a/app/display/gimpdisplayshell-profile.c
+++ b/app/display/gimpdisplayshell-profile.c
@@ -88,7 +88,9 @@ gimp_display_shell_profile_update (GimpDisplayShell *shell)
   config         = GIMP_CORE_CONFIG (display_config)->color_management;
   managed        = GIMP_COLOR_MANAGED (shell);
 
-  src_format = gimp_pickable_get_format (GIMP_PICKABLE (image));
+  src_format = gimp_babl_format (GIMP_RGB,
+                                 gimp_image_get_precision (image),
+                                 TRUE);
 
   if (gimp_display_shell_has_filter (shell))
     dest_format = shell->filter_format;