-extern int InitMurphyPos();
-extern int InitMurphyPosB(int si);
-extern int ResetInfotronsNeeded(int dx);
-extern int subConvertToEasySymbols();
-extern int subFetchAndInitLevel();
-extern int subFetchAndInitLevelA(boolean UpdatePlayTime);
-extern int subFetchAndInitLevelB();
-extern int subInitGameConditions();
+
+extern int subConvertToEasySymbols(void);
+
+extern void InitMurphyPos(void);
+extern void InitMurphyPosB(int);
+extern void ResetInfotronsNeeded(int);
+extern void subFetchAndInitLevel(void);
+extern void subFetchAndInitLevelA(void);
+extern void subFetchAndInitLevelB(void);
+extern void subInitGameConditions(void);