Fix size inconsistency for prg and chr

- Unif shows ROM_size and VROM_size in bytes, while codebase expects these to be
in chunks of 16K for prg and 8K for chr. Update Unif to represent size as its
expected to be.

- Change PRGRomSize and CHRRomSize to represent sizes in bytes to make it consistent
with the rest of the size-related variables in struct CartInfo.

src/ines.h

@@ -40,8 +40,8 @@ typedef struct {
 
 extern uint8 *ROM;
 extern uint8 *VROM;
-extern uint32 ROM_size;
-extern uint32 VROM_size;
+extern uint32 ROM_size;		/* prg size in 16K chunks */
+extern uint32 VROM_size;	/* chr size in 8K chunks */
 extern iNES_HEADER head;
 
 void NSFVRC6_Init(void);