patch 8.2.0853: ml_delete() often called with FALSE argument

Problem:    ml_delete() often called with FALSE argument.
Solution:   Use ml_delete_flags(x, ML_DEL_MESSAGE) when argument is TRUE.
diff --git a/src/change.c b/src/change.c
index 45d6704..3a823b6 100644
--- a/src/change.c
+++ b/src/change.c
@@ -2317,7 +2317,7 @@
 	if (curbuf->b_ml.ml_flags & ML_EMPTY)	    // nothing to delete
 	    break;
 
-	ml_delete(first, TRUE);
+	ml_delete_flags(first, ML_DEL_MESSAGE);
 	++n;
 
 	// If we delete the last line in the file, stop