Fix C89 issues

src/apu.c

@@ -3435,6 +3435,8 @@ void S9xSetSoundMute(bool8 mute)
 
 bool8 S9xInitAPU (void)
 {
+    unsigned i;
+
     uint8_t APUROM[64] =
     {
         0xCD, 0xEF, 0xBD, 0xE8, 0x00, 0xC6, 0x1D, 0xD0,
@@ -3501,7 +3503,7 @@ bool8 S9xInitAPU (void)
 	
 	
 	/* unpack cycle table */
-	for (uint_fast8_t  i = 0; i < 128; i++ )
+	for (i = 0; i < 128; i++ )
 	{
 		int n = cycle_table [i];
 		m.cycle_table [i * 2 + 0] = n >> 4;

src/memmap.c

@@ -2920,6 +2920,7 @@ static bool8 InitROM (void)
 	}
 
 	{
+		unsigned i;
 		const struct {
 			const char *fmt;
 			int val;
@@ -2931,7 +2932,8 @@ static bool8 InitROM (void)
 			{ "PPU.SFXSpeedupHack = %d", PPU.SFXSpeedupHack },
 			{ "coldata_update_screen = %d", coldata_update_screen }
 		};
-		for (int i = 0; i < 6; i++)
+
+		for (i = 0; i < 6; i++)
 		{
 			snprintf(String, sizeof(String), fmt_val[i].fmt, fmt_val[i].val);
 			S9xMessage(S9X_MSG_INFO, S9X_CATEGORY_MAP, String);

src/sa1.c

@@ -368,25 +368,26 @@ void S9xSA1PostLoadState (void)
 
 static void S9xSetSA1MemMap (uint32 which1, uint8 map)
 {
+	unsigned c, i;
 	unsigned start  = which1 * 0x100 + 0xc00;
 	unsigned start2 = which1 * 0x200;
 
 	if (which1 >= 2)
 		start2 += 0x400;
 
-	for ( unsigned c = 0; c < 0x100; c += 16)
+	for (c = 0; c < 0x100; c += 16)
 	{
 		uint8	*block = &Memory.ROM[(map & 7) * 0x100000 + (c << 12)];
-		for ( unsigned i = c; i < c + 16; i++)
+		for (i = c; i < c + 16; i++)
 			Memory.Map[start  + i] = SA1.Map[start  + i] = block;
 	}
 
-	for ( unsigned c = 0; c < 0x200; c += 16)
+	for (c = 0; c < 0x200; c += 16)
 	{
 		int32 offset = (((map & 0x80) ? map : which1) & 7) * 0x100000 + (c << 11) - 0x8000;
 		uint8 *block = &Memory.ROM[offset];
 
-		for ( unsigned i = c + 8; i < c + 16; i++)
+		for (i = c + 8; i < c + 16; i++)
 			Memory.Map[start2 + i] = SA1.Map[start2 + i] = block;
 	}
 }