Use Object.assign instead of extend in P2.BodyDebug
Use Object.assign instead of extend in P2.BodyDebug

Object.assign is faster.

Behavior could change if you were passing null/undefined values in the
`settings` argument (ignored by extend, not by assign).

yupaul/phaser-ce,photonstorm/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce,photonstorm/phaser-ce,yupaul/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce