Because Texture.js dies without it.

Author: photonstorm

build/config.php

@@ -39,6 +39,7 @@
     <script src="$path/src/pixi/Pixi.js"></script>
     <script src="$path/src/pixi/geom/Matrix.js"></script>
     <script src="$path/src/pixi/geom/Polygon.js"></script>
+    <script src="$path/src/pixi/geom/Rectangle.js"></script>
     <script src="$path/src/pixi/geom/RoundedRectangle.js"></script>
     <script src="$path/src/pixi/display/DisplayObject.js"></script>
     <script src="$path/src/pixi/display/DisplayObjectContainer.js"></script>

tasks/manifests/pixi.json

@@ -3,6 +3,7 @@
     "src/pixi/Pixi.js",
     "src/pixi/geom/Polygon.js",
     "src/pixi/geom/Matrix.js",
+    "src/pixi/geom/Rectangle.js",
     "src/pixi/geom/RoundedRectangle.js",
     "src/pixi/display/DisplayObject.js",
     "src/pixi/display/DisplayObjectContainer.js",