Don't use the default framerate for loaded save games

[Caball009]

Loaded skirmish save games play at the default framerate. This ignores whatever framerate they were started with, and it ignores the current framerate (the value of Game Speed) in the skirmish menu.

[xezon]

Yes it always defaults to 30. It is very annoying when testing.

[GoodGh0st]

I think this is related to #446

[Caball009]

I think this is related to #446

Looks like it is, but that doesn't seem accurate. In my testing it always defaults to 30, regardless of what the Game Speed is currently set to in skirmish menu.