`@mtkmodel`: more than one statement in if branch

[baggepinnen]

Component definitions like this are okay inside the @mtkmodel macro

if inertial_wheels
    front_wheels = RollingWheelSet(radius=wheel_radius, m_wheel=wheel_mass, I_axis, I_long, track=wheel_d, state_priority=100)
else
    front_wheels = RollingWheelSetJoint(radius=wheel_radius, track=wheel_d, state_priority=100)
end

if inertial_wheels
    rear_wheels = RollingWheelSet(radius=wheel_radius, m_wheel=wheel_mass, I_axis, I_long, track=wheel_d, state_priority=100, iscut=true)
else
    rear_wheels = RollingWheelSetJoint(radius=wheel_radius, track=wheel_d, state_priority=100, iscut=true)
end

but putting both components in the same if statement

if inertial_wheels
    front_wheels = RollingWheelSet(radius=wheel_radius, m_wheel=wheel_mass, I_axis, I_long, track=wheel_d, state_priority=100)
    rear_wheels = RollingWheelSet(radius=wheel_radius, m_wheel=wheel_mass, I_axis, I_long, track=wheel_d, state_priority=100, iscut=true)
else
    front_wheels = RollingWheelSetJoint(radius=wheel_radius, track=wheel_d, state_priority=100)
    rear_wheels = RollingWheelSetJoint(radius=wheel_radius, track=wheel_d, state_priority=100, iscut=true)
end

errors with front_wheels not defiend.

This problem appears in @equations as well, one can only have one equation per branch at the moment.