fix some bugs with Ares64 tracer, fix trace header too

src/BizHawk.Emulation.Cores/Consoles/Nintendo/Ares64/Ares64.ITraceable.cs

@@ -13,6 +13,16 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.Ares64
 
 		private void MakeTrace(IntPtr disasm)
 		{
+			var disasmStr = Mershul.PtrToStringUtf8(disasm);
+			if (!disasmStr.StartsWith("CPU")) // garbage, ignore
+			{
+				return;
+			}
+			disasmStr = disasmStr.Remove(0, 5); // remove "CPU  "
+			disasmStr = disasmStr.Replace("\n", ""); // remove newlines
+			disasmStr = Regex.Replace(disasmStr, @"\{.*\}", ""); // remove any {*} patterns
+			disasmStr = disasmStr.PadRight(36); // pad
+
 			var regs = GetCpuFlagsAndRegisters();
 			var regsStr = "";
 			foreach (var r in regs)
@@ -25,11 +35,6 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.Ares64
 
 			regsStr = regsStr.Remove(regsStr.Length - 1, 1);
 
-			var disasmStr = Mershul.PtrToStringUtf8(disasm);
-			disasmStr = disasmStr.Remove(0, 5); // remove "CPU  "
-			disasmStr = disasmStr.Replace("\n", ""); // remove newlines
-			disasmStr = Regex.Replace(disasmStr, @"\{.*\}", ""); // remove any {*} patterns
-
 			Tracer.Put(new(
 				disassembly: disasmStr,
 				registerInfo: regsStr));

src/BizHawk.Emulation.Cores/Consoles/Nintendo/Ares64/Ares64.cs

@@ -116,7 +116,7 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.Ares64
 
 			PostInit();
 
-			Tracer = new TraceBuffer("r3400: PC, mnemonic, operands, registers (GPRs, Load/Link Bit, MultHI, MultLO, Implementation/Revision, Control/Status, FGRs)");
+			Tracer = new TraceBuffer("r3400: PC, mnemonic, operands, registers (GPRs, MultLO, MultHI)");
 			_serviceProvider.Register(Tracer);
 
 			_disassembler = new(_core);