Slip/skid indicates correctly in UDP; limit UI slip/skid to 10 deg max.

main/gps.go

@@ -1820,7 +1820,7 @@ func makeAHRSGDL90Report() {
 		pitch = roundToInt16(mySituation.AHRSPitch * 10)
 		roll = roundToInt16(mySituation.AHRSRoll * 10)
 		hdg = roundToInt16(mySituation.AHRSGyroHeading * 10) // TODO westphae: switch to AHRSMagHeading?
-		slip_skid = roundToInt16(mySituation.AHRSSlipSkid * 10)
+		slip_skid = roundToInt16(-mySituation.AHRSSlipSkid * 10)
 		yaw_rate = roundToInt16(mySituation.AHRSTurnRate * 10)
 		g = roundToInt16(mySituation.AHRSGLoad * 10)
 	}

web/plates/js/ahrs.js

@@ -113,6 +113,11 @@ AHRSRenderer.prototype = {
         this.roll = roll;
         this.heading = heading;
 		this.slipSkid = slipSkid;
+		if (this.slipSkid < -10) {
+		    this.slipSkid = -10;
+        } else if (this.slipSkid > 10) {
+		    this.slipSkid = +10;
+        }
 
         this.pitchClip.translate(0, -10 * this.pitch);
         this.rollClip.rotate(this.roll, 0, 0);