get rid of warnings in the mapping module

src/Mapper.hpp

@@ -39,8 +39,8 @@ public:
 		return false;
 	}
 
-	virtual Byte ReadVRAM(Word addr) { return 0x00; }
-	virtual void WriteVRAM(Word addr, Byte val) {}
+	virtual Byte ReadVRAM(Word) { return 0x00; }
+	virtual void WriteVRAM(Word, Byte) {}
 
 protected:
 	Mapper(const Header& header) : header(header), prgBanks(header.PrgROM), chrBanks(header.ChrROM)

src/mappers/Mapper000.cpp

@@ -36,10 +36,10 @@ Byte Mapper000::ReadPPU(Word addr)
 	return 0x00;
 }
 
-void Mapper000::WriteCPU(Word addr, Byte val)
+void Mapper000::WriteCPU(Word, Byte)
 {
 }
 
-void Mapper000::WritePPU(Word addr, Byte val)
+void Mapper000::WritePPU(Word, Byte)
 {
 }

src/mappers/Mapper001.cpp

@@ -99,9 +99,8 @@ void Mapper001::WriteCPU(Word addr, Byte val)
 	}
 }
 
-void Mapper001::WritePPU(Word addr, Byte val)
+void Mapper001::WritePPU(Word, Byte)
 {
-	
 }
 
 bool Mapper001::MapCIRAM(Word& addr)

src/mappers/Mapper003.cpp

@@ -43,6 +43,6 @@ void Mapper003::WriteCPU(Word addr, Byte val)
 	}
 }
 
-void Mapper003::WritePPU(Word addr, Byte val)
+void Mapper003::WritePPU(Word, Byte)
 {
 }