Don't reset the callbacks unless xhrLoader is set
Don't reset the callbacks unless xhrLoader is set

TukekeSoft/phaser,mahill/phaser,BeanSeed/phaser,pixelpicosean/phaser,spayton/phaser,rblopes/phaser,mahill/phaser,TukekeSoft/phaser,BeanSeed/phaser,spayton/phaser,englercj/phaser,photonstorm/phaser,TukekeSoft/phaser,photonstorm/phaser