Merge pull request phaserjs#1315 from pjbaron/dev

Minor logic fix and updateRender change

Author: photonstorm

src/core/Game.js

@@ -719,7 +719,8 @@ Phaser.Game.prototype = {
             this._deltaTime = 0;
             this._spiralling = 0;
 
-            var slowStep = this.time.slowMotion * 1000.0 / this.time.desiredFps;
+            // call the game render update exactly once every frame
+            this.updateRender(this.time.slowMotion * this.time.desiredFps);
         }
         else
         {
@@ -757,10 +758,10 @@ Phaser.Game.prototype = {
             }
 
             this._lastCount = count;
-        }
 
-        // call the game render update exactly once every frame
-        this.updateRender(this._deltaTime / slowStep);
+            // call the game render update exactly once every frame unless we're playing catch-up from a spiral condition
+            this.updateRender(this._deltaTime / slowStep);
+        }
 
     },
 

src/physics/arcade/World.js

@@ -652,9 +652,9 @@ Phaser.Physics.Arcade.prototype = {
 
         var len = group.children.length;
 
-        for (var i = 0; i < len; i++)
+        for (var i = 0; i < len - 1; i++)
         {
-            for (var j = i + 1; j <= len; j++)
+            for (var j = i + 1; j < len; j++)
             {
                 if (group.children[i] && group.children[j] && group.children[i].exists && group.children[j].exists)
                 {