places view: Don't spew needlessly

The check here was obviously meant to filter out cancellations,
not warn for them.

gtk/gtkplacesview.c

@@ -956,7 +956,7 @@ network_enumeration_next_files_finished (GObject      *source_object,
 
   if (error)
     {
-      if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+      if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
         g_warning ("Failed to fetch network locations: %s", error->message);
 
       g_clear_error (&error);