nexentaplugin : volume_size_info

return nothing for now.

This also avoid de call soap api each time in sub path.

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>

PVE/Storage/NexentaPlugin.pm

@@ -311,4 +311,10 @@ sub deactivate_volume {
     return 1;
 }
 
+sub volume_size_info {
+    my ($class, $scfg, $storeid, $volname, $timeout) = @_;
+
+    return undef;
+}
+
 1;