[FIX] Check for image source before logo a href tag, to avoid missing image icon when only text sitetitle is used.
[FIX] Check for image source before logo a href tag, to avoid missing image icon when only text sitetitle is used.

git-svn-id: a7fabbc6a7c54ea5c67cbd16bd322330fd10cc35@14037 b456876b-0849-0410-b77d-98878d47e9d5

changi67/tiki,oregional/tiki,changi67/tiki,changi67/tiki,changi67/tiki,tikiorg/tiki,oregional/tiki,oregional/tiki,changi67/tiki,tikiorg/tiki,oregional/tiki,tikiorg/tiki,tikiorg/tiki