2006-12-21 Marcus Brinkmann <marcus@g10code.de>

• cms.c (build_enveloped_data_header): Initialize CMS_TREE.

Release CMS_TREE, and also TMPWRT always, just as IMAGE and ROOT.
(build_signed_data_attributes): Release all this stuff that's not
released.
(build_signed_data_rest): Likewise.
(ksba_cms_set_sig_val): Release SV and SV->algo on error.
(ksba_cms_release): Free CMS->sig_val.