[ostree] libostree/upgrader: Throw an error if osname is empty

[Colin Walters <walters src gnome org>]

commit 90883674a9dd57fa92bf98e9416c42ac268641b9
Author: Colin Walters <walters verbum org>
Date:   Tue Mar 25 15:47:20 2014 -0400

    libostree/upgrader: Throw an error if osname is empty
    
    This shouldn't happen; I'm just adding the check to force a rebuild.

 src/libostree/ostree-sysroot-upgrader.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/libostree/ostree-sysroot-upgrader.c b/src/libostree/ostree-sysroot-upgrader.c
index c565434..573d3d2 100644
--- a/src/libostree/ostree-sysroot-upgrader.c
+++ b/src/libostree/ostree-sysroot-upgrader.c
@@ -115,6 +115,12 @@ ostree_sysroot_upgrader_initable_init (GInitable        *initable,
       g_assert (booted_deployment);
       self->osname = g_strdup (ostree_deployment_get_osname (booted_deployment));
     }
+  else if (self->osname[0] == '\0')
+    {
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                   "Invalid empty osname");
+      goto out;
+    }
 
   self->merge_deployment = ostree_sysroot_get_merge_deployment (self->sysroot, self->osname); 
   if (self->merge_deployment == NULL)