Mobile howitzers not getting accuracy bonus

The mobile howitzers (Priest, Sexton, Wespe) appear to not be getting the accuracy bonus when a unit has LOS on the target area. Their shots still seem very inaccurate even after firing at the same static target for several minutes.

I was testing svn rev 3166.

I am a sausage.

Also, Nemo is a sausage.

Fixed in r3172. For real this time. Probably. :no4: