Fix Uzebox framerate (squashed PR #3975)

These numbers are derived from the 2010 whitepaper:
NTSC's 4*(315/88 MHz) is doubled to give the master clock rate, which is
then divided by 1820 cycles per line and 262 lines per (progressive)
frame.

---------

Co-authored-by: Morilli <35152647+Morilli@users.noreply.github.com>

src/BizHawk.Client.Common/movie/PlatformFrameRates.cs

@@ -72,7 +72,7 @@ namespace BizHawk.Client.Common
 
 			["ZXSpectrum_PAL"] = 50.080128205,
 			["AmstradCPC_PAL"] = 50.08012820512821,
-			["UZE"] = 60.016319939602,
+			["UZE"] = 1125000.0 / 18733.0, // = 8 * 315000000 / 88 / 1820 / 262 ≈ 60.05444936742646666
 			["VEC"] = 50,
 			["O2"] = 89478485.0 / 1495643, // 59.8260982065907439141559850846
 			["O2_PAL"] = 89478485.0 / 1800319, // 49.70146124103561646574857011

src/BizHawk.Emulation.Cores/Consoles/Belogic/Uzem.cs

@@ -21,8 +21,8 @@ namespace BizHawk.Emulation.Cores.Consoles.Belogic
 				MaxHeight = 224,
 				MaxSamples = 4096,
 				SystemId = VSystemID.Raw.UZE,
-				DefaultFpsNumerator = 28618182,
-				DefaultFpsDenominator = 476840
+				DefaultFpsNumerator = 1125000,
+				DefaultFpsDenominator = 18733,
 			})
 		{
 			_uze = PreInit<LibUzem>(new WaterboxOptions

waterbox/uzem/uzem.cpp

@@ -96,7 +96,7 @@ ECL_EXPORT bool Init()
 	srand(uzebox.randomSeed); //used for the watchdog timer entropy
 
 	blip = blip_new(2048);
-	blip_set_rates(blip, 28618182, 44100);
+	blip_set_rates(blip, 315000000.0 / 11.0, 44100);
 
 	return true;
 }