relax usage of the progress API

Since it is now OK to pass a null pointer to display_progress() and
stop_progress() resulting in a no-op, then we can simplify the code
and remove a bunch of lines by not making those calls conditional all
the time.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/index-pack.c b/index-pack.c
index b4543a4..879ea15 100644
--- a/index-pack.c
+++ b/index-pack.c
@@ -418,12 +418,10 @@
 		} else
 			sha1_object(data, obj->size, obj->type, obj->idx.sha1);
 		free(data);
-		if (verbose)
-			display_progress(progress, i+1);
+		display_progress(progress, i+1);
 	}
 	objects[i].idx.offset = consumed_bytes;
-	if (verbose)
-		stop_progress(&progress);
+	stop_progress(&progress);
 
 	/* Check pack integrity */
 	flush();
@@ -486,8 +484,7 @@
 						      obj->size, obj->type);
 			}
 		free(data);
-		if (verbose)
-			display_progress(progress, nr_resolved_deltas);
+		display_progress(progress, nr_resolved_deltas);
 	}
 }
 
@@ -594,8 +591,7 @@
 			die("local object %s is corrupt", sha1_to_hex(d->base.sha1));
 		append_obj_to_pack(d->base.sha1, data, size, type);
 		free(data);
-		if (verbose)
-			display_progress(progress, nr_resolved_deltas);
+		display_progress(progress, nr_resolved_deltas);
 	}
 	free(sorted_by_pos);
 }
@@ -774,8 +770,7 @@
 	deltas = xmalloc(nr_objects * sizeof(struct delta_entry));
 	parse_pack_objects(sha1);
 	if (nr_deltas == nr_resolved_deltas) {
-		if (verbose)
-			stop_progress(&progress);
+		stop_progress(&progress);
 		/* Flush remaining pack final 20-byte SHA1. */
 		flush();
 	} else {
@@ -788,11 +783,10 @@
 					   (nr_objects + nr_unresolved + 1)
 					   * sizeof(*objects));
 			fix_unresolved_deltas(nr_unresolved);
-			if (verbose) {
-				stop_progress(&progress);
+			stop_progress(&progress);
+			if (verbose)
 				fprintf(stderr, "%d objects were added to complete this thin pack.\n",
 					nr_objects - nr_objects_initial);
-			}
 			fixup_pack_header_footer(output_fd, sha1,
 				curr_pack, nr_objects);
 		}