[m-rev.] Trivial diff: minor change to mode of func_error/1

[Ralph Becket]

Estimated hours taken: 0.1
Branches: main

library/require.m:
	Changed mode of result of func_error/1 from `unused' to `out' to
	avoid mode problems with functions that call func_error/1 in a
	result.

Index: require.m
===================================================================
RCS file: /home/mercury1/repository/mercury/library/require.m,v
retrieving revision 1.29
diff -u -r1.29 require.m
--- require.m	14 Dec 2001 01:06:02 -0000	1.29
+++ require.m	15 Jan 2002 02:58:56 -0000
@@ -25,7 +25,7 @@
 %		message.
 
 :- func func_error(string) = _.
-:- mode func_error(in) = unused is erroneous.
+:- mode func_error(in) = out is erroneous.
 
 %	func_error(Message)
 %		An expression that results in a `software_error(Message)'
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