Physical Camera motion blur doesn't update properly in IR

[pokoy]

1.4 / max 2016

When using Physical camera's mblur shutter duration in IR mode, the IR update will not take into account the last value but the value before, repro (leaving out the obvious steps like setting up a scene with mblur):

1. set shutter to 1/25 - no update
2. set shutter to 1/100 - IR renders shutter at 1/25 instead of 1/100
3. set shutter to 1/50 - IR render shutter at 1/100 instead of 1/50

[Ondra]

fixed lately