make sure an stabilized event is always fired atleast once.

lib/network/modules/PhysicsEngine.js

@@ -21,6 +21,7 @@ class PhysicsEngine {
     this.previousStates = {};
     this.freezeCache = {};
     this.renderTimer = undefined;
+    this.initialStabilizationEmitted = false;
 
     this.stabilized = false;
     this.startedStabilization = false;
@@ -237,7 +238,8 @@ class PhysicsEngine {
   }
 
   _emitStabilized() {
-    if (this.stabilizationIterations > 0) {
+    if (this.stabilizationIterations > 1 || this.initialStabilizationEmitted === false) {
+      this.initialStabilizationEmitted = true;
       setTimeout(() => {
         this.body.emitter.emit('stabilized', {iterations: this.stabilizationIterations});
         this.stabilizationIterations = 0;