- Remove circular include

git-svn-id: http://odamex.net/svn/root/trunk@3666 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Fix a divide-by-zero in r3628 that happens when an ANIMDEF does not have any frames defined.

git-svn-id: http://odamex.net/svn/root/trunk@3667 b0bcef46-2027-0410-bd56-ab726e9a1d04