fixed doxygen error in MomentArmSolver (couldn't help it after I spent so long clearing all those doxygen errors)
fixed doxygen error in MomentArmSolver (couldn't help it after I spent so long clearing all those doxygen errors)


git-svn-id: 9e047e1e624cce0a2485e750063112e834f85522@8102 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