Convert global variables to local variables

This file is unnecessarily adding global variables with names like v, w, loader, etc. Polluting the global namespace is dangerous and makes everyone's code more prone to bugs.

I simply added "var" declarations to convert the global variables to local variables.

examples/js/loaders/ColladaLoader.js

@@ -635,7 +635,7 @@ THREE.ColladaLoader = function () {
 		var bones = [];
 		setupSkeleton( skeleton, bones, -1 );
 		setupSkinningMatrices( bones, skinController.skin );
-		v = new THREE.Vector3();
+		var v = new THREE.Vector3();
 		var skinned = [];
 
 		for (var i = 0; i < geometry.vertices.length; i ++) {
@@ -648,14 +648,14 @@ THREE.ColladaLoader = function () {
 
 			if ( bones[ i ].type != 'JOINT' ) continue;
 
-			for ( j = 0; j < bones[ i ].weights.length; j ++ ) {
+			for ( var j = 0; j < bones[ i ].weights.length; j ++ ) {
 
-				w = bones[ i ].weights[ j ];
-				vidx = w.index;
-				weight = w.weight;
+				var w = bones[ i ].weights[ j ];
+				var vidx = w.index;
+				var weight = w.weight;
 
-				o = geometry.vertices[vidx];
-				s = skinned[vidx];
+				var o = geometry.vertices[vidx];
+				var s = skinned[vidx];
 
 				v.x = o.x;
 				v.y = o.y;
@@ -5188,7 +5188,7 @@ THREE.ColladaLoader = function () {
 
 	function loadTextureImage ( texture, url ) {
 
-		loader = new THREE.ImageLoader();
+		var loader = new THREE.ImageLoader();
 
 		loader.load( url, function ( image ) {