Fix default initialization issue in FilterRoot
Fix default initialization issue in FilterRoot

These variables must be default initialized in order to ensure their corresponding tests reliably pass.

codemercenary/autowiring,codemercenary/autowiring,codemercenary/autowiring,codemercenary/autowiring,leapmotion/autowiring,leapmotion/autowiring,leapmotion/autowiring,codemercenary/autowiring,leapmotion/autowiring,leapmotion/autowiring,leapmotion/autowiring,codemercenary/autowiring