trivial diff: Fix grammatical error in mdb messages

[Mark Anthony BROWN]

Hi,

Estimated hours taken: 0.1

trace/mercury_trace_internal.c:
	Add some missing verbs to debugger messages.


Index: trace/mercury_trace_internal.c
===================================================================
RCS file: /home/mercury1/repository/mercury/trace/mercury_trace_internal.c,v
retrieving revision 1.19
diff -u -t -r1.19 mercury_trace_internal.c
--- mercury_trace_internal.c	1998/12/17 13:37:16	1.19
+++ mercury_trace_internal.c	1998/12/18 02:55:19
@@ -857,7 +857,7 @@
 
                         if (MR_spy_point_next == 0) {
                                 fprintf(MR_mdb_out,
-                                        "There no break points yet.\n");
+                                        "There are no break points yet.\n");
                         }
                 } else {
                         MR_trace_usage("breakpoint", "enable");
@@ -880,7 +880,7 @@
 
                         if (MR_spy_point_next == 0) {
                                 fprintf(MR_mdb_err,
-                                        "There no break points yet.\n");
+                                        "There are no break points yet.\n");
                         }
                 } else {
                         MR_trace_usage("breakpoint", "disable");