[PATCH] Fix up English grammar in an error msg

[Marek Polacek]

As the subject says.  Ok for trunk?

2013-01-19  Marek Polacek  <pola...@redhat.com>

        * cfgloop.c (verify_loop_structure): Fix up grammar.

--- gcc/cfgloop.c.mp    2013-01-19 00:34:50.857710526 +0100
+++ gcc/cfgloop.c       2013-01-19 00:35:03.310764236 +0100
@@ -1344,7 +1344,7 @@ verify_loop_structure (void)
       for (j = 0; j < loop->num_nodes; j++)
        if (!flow_bb_inside_loop_p (loop, bbs[j]))
          {
-           error ("bb %d do not belong to loop %d",
+           error ("bb %d does not belong to loop %d",
                   bbs[j]->index, loop->num);
            err = 1;
          }

        Marek