/*D
   MPI_T_cvar_handle_free - Free an existing handle for a control variable

Synopsis:
.vb
int MPI_T_cvar_handle_free(MPI_T_cvar_handle *handle)
.ve

Input/Output Parameters:
. handle - handle to be freed (handle)

.N ThreadSafe

.N Errors
.N MPI_SUCCESS
.N MPI_T_ERR_INVALID_HANDLE
.N MPI_T_ERR_NOT_INITIALIZED
.N MPI_ERR_OTHER

D*/

