Alters zombified dogs' speed ratings.

After hearing a lot of complaints about the various zombie dogs I
decided to look into their numbers. Everything looked fine except for
their speeds, which were pretty crazy values.

Keep in mind that a normal, living dog has a speed of 150 and a normal
zombie dog has a speed of 105.

Stuff I changed:

skeleton dog had speed 160 which I reduced to 125
Z-9 and rot-weiler had speed 150 which I reduced to 105