Setting the motor variable correctly

Oimo has no standard name for the motors.
A future change will also add translation motors, for now only
rotational motors are supported.

src/Physics/Plugins/babylon.oimoJSPlugin.ts

@@ -370,14 +370,16 @@ module BABYLON {
         }
 
         public setMotor(joint: IMotorEnabledJoint, speed: number, maxForce?: number, motorIndex?: number) {
-            var motor = motorIndex ? joint.physicsJoint.rotationalLimitMotor2 : joint.physicsJoint.rotationalLimitMotor1 || joint.physicsJoint.limitMotor;
+            //TODO separate rotational and transational motors.
+            var motor = motorIndex ? joint.physicsJoint.rotationalLimitMotor2 : joint.physicsJoint.rotationalLimitMotor1 || joint.physicsJoint.rotationalLimitMotor || joint.physicsJoint.limitMotor;
             if (motor) {
                 motor.setMotor(speed, maxForce);
             }
         }
 
         public setLimit(joint: IMotorEnabledJoint, upperLimit: number, lowerLimit?: number, motorIndex?: number) {
-            var motor = motorIndex ? joint.physicsJoint.rotationalLimitMotor2 : joint.physicsJoint.rotationalLimitMotor1 || joint.physicsJoint.limitMotor;
+            //TODO separate rotational and transational motors.
+            var motor = motorIndex ? joint.physicsJoint.rotationalLimitMotor2 : joint.physicsJoint.rotationalLimitMotor1 || joint.physicsJoint.rotationalLimitMotor || joint.physicsJoint.limitMotor;
             if (motor) {
                 motor.setLimit(upperLimit, lowerLimit === void 0 ? -upperLimit : lowerLimit);
             }