sendxmpp print perturbing warnings

[H.-Dirk Schmitt]

Each invocation print out the following messages

Use of uninitialized value $args{"file"} in lc at /usr/share/perl5/Net/XMPP/Debug.pm line 154.
Use of uninitialized value within @_ in lc at /usr/share/perl5/XML/Stream/Parser.pm line 71.
Use of uninitialized value within @_ in lc at /usr/share/perl5/XML/Stream/Parser.pm line 71.
Use of uninitialized value within @_ in lc at /usr/share/perl5/XML/Stream/Parser.pm line 71.

This force the to redirect the output (stderr) to /dev/null if it used inside a script.
An possible serious problem may be hidden through the redirection.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: sendxmpp 1.22-1
ProcVersionSignature: Ubuntu 3.2.0-34.53-generic 3.2.33
Uname: Linux 3.2.0-34-generic x86_64
ApportVersion: 2.0.1-0ubuntu15
Architecture: amd64
Date: Wed Nov 28 17:42:31 2012
MarkForUpload: True
PackageArchitecture: all
SourcePackage: sendxmpp
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.