Merge pull request #845 from cesarBLG/adhesion-resume

Save axle integrator status

Author: cesarBLG

Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/PowerTransmissions/Axle.cs

@@ -630,7 +630,6 @@ public Axle()
         }
         public void Initialize()
         {
-            AxleSpeedMpS = 0;
             motor?.Initialize();
         }
         public void InitializeMoving()
@@ -677,6 +676,8 @@ public void Restore(BinaryReader inf)
             previousSlipSpeedMpS = inf.ReadSingle();
             AxleForceN = inf.ReadSingle();
             AxleSpeedMpS = inf.ReadSingle();
+            NumOfSubstepsPS = inf.ReadInt32();
+            integratorError = inf.ReadSingle();
         }
 
         /// <summary>
@@ -689,6 +690,8 @@ public void Save(BinaryWriter outf)
             outf.Write(previousSlipSpeedMpS);
             outf.Write(AxleForceN);
             outf.Write(AxleSpeedMpS);
+            outf.Write(NumOfSubstepsPS);
+            outf.Write(integratorError);
         }
 
         /// <summary>