Rewire memory domain pointers after reset in Citra

Add 3DS framerate in PlatformFrameRates

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

@@ -40,6 +40,7 @@ namespace BizHawk.Client.Common
 
 			["GBA"] = 262144.0 / 4389.0, // 59.7275005696
 			["NDS"] = 33513982.0 / 560190.0, // 59.8260982881
+			["3DS"] = 268111856.0 / 4481136.0, // 59.8312249394
 			["GEN"] = 53693175 / (3420.0 * 262),
 			["GEN_PAL"] = 53203424 / (3420.0 * 313),
 

src/BizHawk.Emulation.Cores/Consoles/Nintendo/3DS/Citra.IEmulator.cs

@@ -29,6 +29,8 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.N3DS
 			if (_controller.IsPressed("Reset"))
 			{
 				_core.Citra_Reset(_context);
+				// memory domain pointers are no longer valid, reset them
+				WireMemoryDomains();
 			}
 
 			_core.Citra_RunFrame(_context);