util.stanza: stanza:reset() method to reset building state

diff --git a/util/stanza.lua b/util/stanza.lua
index 1ad3679ba84579bc92122d18146272bdc9730ad7..7e40dfa43d1dadb14e4fa0e24ab88dd12d805f75 100644 (file)
--- a/util/stanza.lua
+++ b/util/stanza.lua
@@ -65,6 +65,14 @@ function stanza_mt:up()
        return self;
 end
 
+function stanza_mt:reset()
+       local last_add = self.last_add;
+       for i = 1,#last_add do
+               last_add[i] = nil;
+       end
+       return self;
+end
+
 function stanza_mt:add_direct_child(child)
        if type(child) == "table" then
                t_insert(self.tags, child);