Default maxMach to 1.0 so the slider still shows up when no jet engines are present
Default maxMach to 1.0 so the slider still shows up when no jet engines are present

--- a/KerbalEngineer/VesselSimulator/Simulation.cs
+++ b/KerbalEngineer/VesselSimulator/Simulation.cs
@@ -147,6 +147,7 @@
             this.atmosphere = theAtmosphere;
             this.mach = theMach;
             this.lastStage = Staging.lastStage;
+            this.maxMach = 1.0f;
             //MonoBehaviour.print("lastStage = " + lastStage);
 
             // Clear the lists for our simulation parts