/*D
   MPI_Info_get_valuelen - Retrieves the length of the value associated with a key

Synopsis:
.vb
int MPI_Info_get_valuelen(MPI_Info info, const char *key, int *valuelen,
                          int *flag)
.ve

Input Parameters:
+ info - info object (handle)
- key - key (string)

Output Parameters:
+ valuelen - length of value arg (integer)
- flag - true if key defined, false if not (boolean)

.N Deprecated
   'MPI_Info_get_string' should be used instead of this routine.

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_INFO
.N MPI_ERR_OTHER

D*/

