Fixed a problem with slow-sync and using the same engine more then one time without finalizing. This fix avoid slow-sync everytime even if this isn't requested. This happens when the engine got initiziliazed once and get a request for slow-sync by frontend or plugin. The slow-sync would be never disabled and would trigger a slow-sync _every_ time...
Fixed a problem with slow-sync and using the same engine more then one time
without finalizing. This fix avoid slow-sync everytime even if this
isn't requested. This happens when the engine got initiziliazed once and
get a request for slow-sync by frontend or plugin. The slow-sync would
be never disabled and would trigger a slow-sync _every_ time...

Tests to verify this issue:
unittest: sync - testcase: sync_easy_new_mapping, sync_easy_new_del, ...
(Actually every test which doesn't call osync_engine_finalize() after
 every osync_engine_sync.._and_block() call.)


git-svn-id: e31799a7ad59d6ea355ca047c69e0aee8a59fcd3@2013 53f5c7ee-bee3-0310-bbc5-ea0e15fffd5e

luizluca/opensync-luizluca,luizluca/opensync-luizluca