[m-dev.] trivial diff: update some comments

[Mark Anthony BROWN]

Estimated hours taken: 0.1

trace/mercury_trace_vars.h:
	Fix/improve some comments.

Index: mercury_trace_vars.h
===================================================================
RCS file: /home/mercury1/repository/mercury/trace/mercury_trace_vars.h,v
retrieving revision 1.4
diff -u -r1.4 mercury_trace_vars.h
--- mercury_trace_vars.h	1999/12/10 04:24:09	1.4
+++ mercury_trace_vars.h	2000/02/18 16:04:34
@@ -7,7 +7,7 @@
 ** that are live at a given program point.
 **
 ** When execution arrives at an event, the debugger should call the function
-** MR_trace_point_init_vars to initialize this module's data structures
+** MR_trace_init_point_vars to initialize this module's data structures
 ** to reflect the variables that are live at that event. During the processing
 ** of the various debugger commands while at that event, the debugger may
 ** call MR_trace_set_level zero or more times to change this module's notion
@@ -78,7 +78,8 @@
 
 /*
 ** Return the name, type and value of the specified variable in the specified
-** locations, except those which are NULL.
+** locations, except those which are NULL.  Variable number n must be
+** in the range 1..MR_trace_var_count().
 */
 
 extern	const char	*MR_trace_return_var_info(int n, const char **name_ptr,
-- 
Mark Brown, PhD student            )O+  |  "Another of Fortran's breakthroughs
(m.brown at cs.mu.oz.au)                   |  was the GOTO statement, which was...
Dept. of Computer Science and Software  |  uniquely simple and understandable"
Engineering, University of Melbourne    |              -- IEEE, 1994
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