trivial diff: fix warning

[Fergus Henderson]

library/mercury_builtin.m:
	Fix a warning: in the definition of copy/2,
	cast the 2nd argument of deep_copy() to the right type.

Index: mercury_builtin.m
===================================================================
RCS file: /home/staff/zs/imp/mercury/library/mercury_builtin.m,v
retrieving revision 1.86
diff -u -u -r1.86 mercury_builtin.m
--- mercury_builtin.m	1997/12/03 07:05:08	1.86
+++ mercury_builtin.m	1997/12/18 15:52:52
@@ -743,7 +743,7 @@
 	value = r2;
 
 	save_transient_registers();
-	copy = deep_copy(value, type_info, NULL, NULL);
+	copy = deep_copy(value, (Word *) type_info, NULL, NULL);
 	restore_transient_registers();
 
 #ifdef	COMPACT_ARGS

-- 
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