Ensure to protect the "use mpi" build properly

cmr=v1.7.4:ticket=4162

This commit was SVN r30387.

The following Trac tickets were found above:
  Ticket 4162 --> https://svn.open-mpi.org/trac/ompi/ticket/4162

config/ompi_setup_mpi_fortran.m4

@@ -313,7 +313,8 @@ AC_DEFUN([OMPI_SETUP_MPI_FORTRAN],[
     # If we got here, we can build the mpi module if it was requested.
     # Decide whether to build the ignore TKR version or the
     # non-ignore-TKR/legacy version.
-    AS_IF([test $OMPI_WANT_FORTRAN_USEMPI_BINDINGS -eq 1],
+    AS_IF([test $OMPI_WANT_FORTRAN_USEMPI_BINDINGS -eq 1 && \
+           test $ompi_fortran_happy -eq 1],
           [OMPI_BUILD_FORTRAN_USEMPI_BINDINGS=1
            AS_IF([test $OMPI_FORTRAN_HAVE_IGNORE_TKR -eq 1],
                  [OMPI_FORTRAN_USEMPI_DIR=mpi/fortran/use-mpi-ignore-tkr