lua-fix crashes when scripts terminate

BizHawk.MultiClient/LuaImplementation.cs

@@ -218,15 +218,25 @@ namespace BizHawk.MultiClient
 		public class ResumeResult
 		{
 			public bool WaitForFrame;
+			public bool Terminated;
 		}
 
 		public ResumeResult ResumeScript(Lua script)
 		{
 			currThread = script;
-			script.Resume(0);
+			int execResult = script.Resume(0);
 			currThread = null;
 			var result = new ResumeResult();
-			result.WaitForFrame = FrameAdvanceRequested;
+			if (execResult == 0)
+			{
+				//terminated
+				result.Terminated = true;
+			}
+			else
+			{
+				//yielded
+				result.WaitForFrame = FrameAdvanceRequested;
+			}
 			FrameAdvanceRequested = false;
 			return result;
 		}

BizHawk.MultiClient/tools/LuaConsole.cs

@@ -845,6 +845,7 @@ namespace BizHawk.MultiClient
 						if (!prohibit)
 						{
 							var result = LuaImp.ResumeScript(s.Thread);
+							if(result.Terminated) s.Stop();
 							s.FrameWaiting = result.WaitForFrame;
 						}
 					}

LuaInterface/LuaInterface/Lua.cs

@@ -527,8 +527,8 @@ namespace LuaInterface
 					int ret = LuaDLL.lua_resume(luaState, narg);
 					if (ret == 1 /*LUA_YIELD*/)
 						return 1; //yielded
-					if (ret == 0) //normal termination - what to do?
-						return 0;
+					if (ret == 0) 
+						return 0; //normal termination
 					//error. throw exception with error message (TBD - debug api to get call stack)
 					ThrowExceptionFromError(top);
 					return ret;