[REF] get_files(): make $find optional
[REF] get_files(): make $find optional

git-svn-id: a7fabbc6a7c54ea5c67cbd16bd322330fd10cc35@63817 b456876b-0849-0410-b77d-98878d47e9d5

tikiorg/tiki,tikiorg/tiki,tikiorg/tiki,tikiorg/tiki