pixi renderer fixes
pixi renderer fixes

Luwdo/PhysicsJS,wellcaffeinated/PhysicsJS,wellcaffeinated/PhysicsJS,pietro909/PhysicsJS,eric-seekas/PhysicsJS,haithemaraissia/PhysicsJS,pietro909/PhysicsJS,griever989/PhysicsJS,rohit765/PhysicsJS,VANITAX/PhysicsJS,griever989/PhysicsJS,haithemaraissia/PhysicsJS,rohit765/PhysicsJS,jpellerin/PhysicsJS,VANITAX/PhysicsJS,eric-seekas/PhysicsJS,mcanthony/PhysicsJS,Luwdo/PhysicsJS,Nayar/PhysicsJS,Rawneed/PhysicsJS,Rawneed/PhysicsJS,jpellerin/PhysicsJS,mcanthony/PhysicsJS,Nayar/PhysicsJS