fix: don't round the braking curve speed

This change allows the NJT ADU to smoothly shrink the overspeed bar.

Src/Lib/SafetySystems/AspectDisplay/AspectDisplay.lua

@@ -88,7 +88,7 @@ end
 function P:getcivilcurvespeed_mph()
   local acsesspeed_mps = self._acses:getcurvespeed_mps()
   if acsesspeed_mps then
-    return Misc.round(acsesspeed_mps * Units.mps.tomph)
+    return acsesspeed_mps * Units.mps.tomph
   else
     return nil
   end