correctly set all variables storing information on the file pointer position to zero when setting the file view

(cherry picked from commit open-mpi/ompi@46c20a1)

Author: edgargabriel

ompi/mca/io/ompio/io_ompio_file_set_view.c

@@ -104,6 +104,8 @@ int mca_io_ompio_set_view_internal(mca_io_ompio_file_t *fh,
     fh->f_disp        = disp;
     fh->f_offset      = disp;
     fh->f_total_bytes = 0;
+    fh->f_index_in_file_view=0;
+    fh->f_position_in_file_view=0;
 
     ompi_io_ompio_decode_datatype (fh,
                                    newfiletype,