[ostree] ostree: do not print the usage on each G_IO_ERROR_NOT_SUPPORTED

[Giuseppe Scrivano <gscrivano src gnome org>]

commit b393e5a2e970de97cd5e59861f00589313fc84c6
Author: Giuseppe Scrivano <gscrivan redhat com>
Date:   Fri Nov 6 12:06:26 2015 +0100

    ostree: do not print the usage on each G_IO_ERROR_NOT_SUPPORTED
    
    It may have a different meaning, and the usage screen is not helpful.
    
    Print the usage screen only when the command is not found.
    
    Signed-off-by: Giuseppe Scrivano <gscrivan redhat com>

 src/ostree/main.c    |    2 --
 src/ostree/ot-main.c |    1 +
 2 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/src/ostree/main.c b/src/ostree/main.c
index 8842bf3..99d7d91 100644
--- a/src/ostree/main.c
+++ b/src/ostree/main.c
@@ -75,8 +75,6 @@ main (int    argc,
   g_set_prgname (argv[0]);
 
   ret = ostree_run (argc, argv, commands, &error);
-  if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED))
-    ostree_usage (commands, TRUE);
 
   if (error != NULL)
     {
diff --git a/src/ostree/ot-main.c b/src/ostree/ot-main.c
index 44e1bd4..5b54af4 100644
--- a/src/ostree/ot-main.c
+++ b/src/ostree/ot-main.c
@@ -190,6 +190,7 @@ ostree_run (int    argc,
             {
               g_set_error (&error, G_IO_ERROR, G_IO_ERROR_FAILED,
                            "Unknown command '%s'", command_name);
+              ostree_usage (commands, TRUE);
             }
         }