KWAKU v SERWAH AND OTHERS    Practice and procedure—Pleadings—Issues for trial—Substitution of new case by court—Principle in Dam v Addo proscribing substitution proprio motu by court of case contrary to pleadings of parties—Dispute over ownership of house included by testator, KM, in his estate—Both plaintiff and KM, uterine brothers, claiming house as self-acquired property—Trial court finding house built by KM alone but on land as belonging to plaintiff—Plaintiff held by Court of Appeal to have permitted KM to build family house—Whether held by Court of Appeal violating principle in Dam v Addo.    