[m-rev.] trivial diff: fix compiler in erlang grade

[Julien Fischer]

Branches: main, 11.07

Fix compilation of the compiler in the erlang grade.

compiler/timestamp.m:
 	Add a missing module import required by the erlang grade.

Julien.

Index: compiler/timestamp.m
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/compiler/timestamp.m,v
retrieving revision 1.20
diff -u -r1.20 timestamp.m
--- compiler/timestamp.m	15 Jun 2011 01:05:33 -0000	1.20
+++ compiler/timestamp.m	19 Dec 2011 04:36:17 -0000
@@ -56,6 +56,7 @@
  :- import_module char.
  :- import_module int.
  :- import_module maybe.
+:- import_module require.   % Required for erlang grade.
  :- import_module string.

  %-----------------------------------------------------------------------------%

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