[BUGFIX] Don't implicitly create an invite node when checking invite …

…status

Fixes adhearsion#81

lib/blather/stanza/presence/muc_user.rb

@@ -61,7 +61,7 @@ def password=(var)
     end
 
     def invite?
-      !!invite
+      !!find_invite_node
     end
 
     def muc_user
@@ -99,14 +99,18 @@ def find_password_node
     end
 
     def invite
-      if invite = muc_user.find_first('ns:invite', :ns => self.class.registered_ns)
+      if invite = find_invite_node
         Invite.new invite
       else
         muc_user << (invite = Invite.new nil, nil, nil, self.document)
         invite
       end
     end
 
+    def find_invite_node
+      muc_user.find_first 'ns:invite', :ns => self.class.registered_ns
+    end
+
     class Item < XMPPNode
       def self.new(affiliation = nil, role = nil, jid = nil, document = nil)
         new_node = super :item, document

spec/blather/stanza/presence/muc_user_spec.rb

@@ -102,6 +102,11 @@ def muc_invite_xml
     muc_user.password.must_equal 'hello_world'
   end
 
+  it "should not be an #invite?" do
+    muc_user = Blather::Stanza::Presence::MUCUser.new
+    muc_user.invite?.must_equal false
+  end
+
   describe "with an invite element" do
     it "should be an #invite?" do
       muc_user = Blather::XMPPNode.import(parse_stanza(muc_invite_xml).root)