Normalize polar angle at creation

src/Polar.cpp

@@ -11,10 +11,10 @@ Polar::Polar() {
 Polar::Polar(float newAngle, float newDistance) {
   // distance should always be 0 or greater
   if (newDistance < 0) {
-    angle = newAngle - 180;
+    angle = Angle::Normalize(newAngle - 180);
     distance = -newDistance;
   } else {
-    angle = newAngle;
+    angle = Angle::Normalize(newAngle);
     distance = newDistance;
   }
 }