Organic: remove unused member variable
LadspaEffect/CALF: enable inline flags for GCC only
FxMixerView: declare as class for consistency with friend declaration later
LadspaEffect/CALF: Clang compatibility fixes
Nes/NesObject: remove unused m_fpp variable
LadspaEffect/SWH: remove unused variables and useless assignments for better Clang compatibility
LadspaEffect/CMT: remove unused variables and useless assignments for better Clang compatibility