UPDATE 3-Assad "peace plan" greeted with scorn by foes

* Assad says there is no partner for peace talks * He calls on Syrians to join "war to defend the nation" * First speech in six months appears to snub Brahimi plan * Opposition and Western powers say speech offers nothing BEIRUT, Jan 6 (Reuters) - Syrian President Bashar al-Assadrejected peace talks with his enemies on Sunday in a defiantspeech that his opponents described as a renewed ...