disallow newlines in say text


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1922 b412e182-2ed4-4078-95c4-27dc59f57fa9
Merge branch 'master' of https://github.com/piernov/tesseract

Conflicts:
	src/enet
	src/game/client.cpp
	src/game/server.cpp