Fix a warning in MSVC
Fix a warning in MSVC

Use bang-bang syntax instead of casting to bool in order to avoid a performance warning in MSVC

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