KCC::move_shape early break in case of no update.

If no movements are performed in an iteration of move_shape, early
break, instead of trying to repeat it again.

src/control/character_controller.rs

@@ -195,6 +195,7 @@ impl KinematicCharacterController {
         self.check_and_fix_penetrations();
 
         let mut translation_remaining = desired_translation;
+        let mut translation_before = result.translation;
 
         // Check if we are grounded at the initial position.
         let grounded_at_starting_pos = self.detect_grounded_status_and_apply_friction(
@@ -290,6 +291,11 @@ impl KinematicCharacterController {
                 Some(&mut translation_remaining),
             );
 
+            if (translation_before - result.translation).norm_squared() < 1e-10 {
+                break;
+            }
+            translation_before = result.translation;
+
             if !self.slide {
                 break;
             }