REPUBLIC v. DISTRICT MAGISTRATE GRADE 1, TARKWA; EX PARTE PANYIN III AND OTHERS Criminal law and procedure—Criminal summons—Nullity—Condition for reviewing orders or summons for omissions or irregularity—Magistrate making order under Act 30, s. 24—Accused subsequently ordered to execute bond without being heard—Whether mere omissions of information in order and failure to accompany summons with order nullifying proceedings—Failure to give accused opportunity to be heard occasioning substantial miscarriage of justice—Whether certiorari available—Defective proceedings vacated with concurrence of counsel and new order issued—Whether counsel can take advantage of irregularity in subsequent proceedings—Criminal Procedure Code, 1960 (Act 30), s. 406.