(svn r1594) Convert all undefined parameter lists to (void) and add the appropriate warning flags in the Makefile

fileio.h

@@ -3,11 +3,11 @@
 
 void FioSeekTo(uint32 pos, int mode);
 void FioSeekToFile(uint32 pos);
-uint32 FioGetPos();
-byte FioReadByte();
-uint16 FioReadWord();
-uint32 FioReadDword();
-void FioCloseAll();
+uint32 FioGetPos(void);
+byte FioReadByte(void);
+uint16 FioReadWord(void);
+uint32 FioReadDword(void);
+void FioCloseAll(void);
 void FioOpenFile(int slot, const char *filename);
 void FioReadBlock(void *ptr, uint size);
 void FioSkipBytes(int n);