[glib: 1/4] gvfs: Add an assertion to check that get_file_for_uri() is never NULL

[Philip Withnall <pwithnall src gnome org>]

commit e24503a8e9a9125e4471b89cc5ea0b881579c066
Author: Philip Withnall <withnall endlessm com>
Date:   Tue Jul 2 12:08:45 2019 +0100

    gvfs: Add an assertion to check that get_file_for_uri() is never NULL
    
    It cannot return a NULL value, as none of its callers have error
    handlng. Add an assertion to check the values returned by the VFS
    implementations.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    Helps: #1819

 gio/gvfs.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/gio/gvfs.c b/gio/gvfs.c
index 5805a7904..3475624cf 100644
--- a/gio/gvfs.c
+++ b/gio/gvfs.c
@@ -236,7 +236,7 @@ g_vfs_get_file_for_uri (GVfs       *vfs,
                         const char *uri)
 {
   GVfsClass *class;
-  GFile *ret;
+  GFile *ret = NULL;
  
   g_return_val_if_fail (G_IS_VFS (vfs), NULL);
   g_return_val_if_fail (uri != NULL, NULL);
@@ -244,10 +244,12 @@ g_vfs_get_file_for_uri (GVfs       *vfs,
   class = G_VFS_GET_CLASS (vfs);
 
   ret = get_file_for_uri_internal (vfs, uri);
-  if (ret)
-    return ret;
+  if (!ret)
+    ret = (* class->get_file_for_uri) (vfs, uri);
+
+  g_assert (ret != NULL);
 
-  return (* class->get_file_for_uri) (vfs, uri);
+  return g_steal_pointer (&ret);
 }
 
 /**