Fix win size translation in attrlangf90 test.

This test passed a 0 size to win_create which is translated to a
integer(32bit) var by fortran compiler and passed to c mpi_win_create as
an invalid MPI_Aint(64bit) var by fortran binding because prototype
checking is not supported. This test can be failed if mpi_win_create
internally initializes resource related to the value of size (i.e., mxm
maps win buffer in win_init).

This patch fixed this issue by passing a 64bit local variable as size
parameter instead of a constant var 0 in this f90 test.
Signed-off-by: Junchao Zhang <jczhang@mcs.anl.gov>

test/mpi/f90/attr/attrlangf90.f90

@@ -142,6 +142,7 @@
       implicit none
       integer ierr
       integer errs, tv, rank
+      integer(MPI_ADDRESS_KIND) tmp
 
       errs = 0
       call MPI_INIT( ierr )
@@ -193,7 +194,8 @@
            & )
 !
 !     Create a window to use with the attribute tests in Fortran
-      call MPI_WIN_CREATE( MPI_BOTTOM, 0, 1, MPI_INFO_NULL,&
+      tmp = 0
+      call MPI_WIN_CREATE( MPI_BOTTOM, tmp, 1, MPI_INFO_NULL,&
            & MPI_COMM_WORLD, win, ierr )
 !
       if (fverbose) then