Multiplied the partial derivative of the moving muscle point w.r.t to the gencoord by the genspeed to get the body-fixed velocity of the moving point.
Multiplied the partial derivative of the moving muscle point w.r.t to the gencoord by the genspeed to get the body-fixed velocity of the moving point.

git-svn-id: 9e047e1e624cce0a2485e750063112e834f85522@3221 fc29be9c-2cb0-420d-b520-73dbd18add6e

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core