Fix for SourceForge bug #2826594 (allow reverse to work on empty list).
Fix for SourceForge bug #2826594 (allow reverse to work on empty list).


git-svn-id: 4046496ac449cbd00d97751c78959f101e5fb0cf@64 4a0124f5-7288-4c88-8df5-efb20b5748ad

andresmusetti/tinyscheme,barak/tinyscheme,barak/tinyscheme,andresmusetti/tinyscheme