isisd: purge on correct level

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>
diff --git a/isisd/isis_pdu.c b/isisd/isis_pdu.c
index 0c3f57f..d2be27b 100644
--- a/isisd/isis_pdu.c
+++ b/isisd/isis_pdu.c
@@ -1557,7 +1557,7 @@
       if (!lsp)
 	{
 	  /* 7.3.16.4: initiate a purge */
-	  lsp_purge_non_exist (hdr, circuit->area);
+	  lsp_purge_non_exist(level, hdr, circuit->area);
 	  return ISIS_OK;
 	}
       /* 7.3.15.1 d) - If this is our own lsp and we have it */