Added default definition for supercast
Added default definition for supercast

rahulmutt/ghcvm,rahulmutt/ghcvm,rahulmutt/ghcvm,alexander-at-github/eta,pparkkin/eta,pparkkin/eta,AlexeyRaga/eta,rahulmutt/ghcvm,alexander-at-github/eta,AlexeyRaga/eta,alexander-at-github/eta,AlexeyRaga/eta,alexander-at-github/eta,pparkkin/eta,pparkkin/eta,AlexeyRaga/eta,pparkkin/eta,rahulmutt/ghcvm,alexander-at-github/eta,AlexeyRaga/eta