Startup: if no buffers are loaded, make sure history doesn't try to log the current buffer.
http://bugs.activestate.com/show_bug.cgi?id=100501
rn=

(integrated from komodo (trunk) change 82102 by ericp)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13667 b87d16e7-d29f-4ee1-b5ec-817d645d335f