blktrace: print correct usage

Fixup for 498898:

Problem:
When somebody runs blktrace without parameters, it
shows the usage message. The usage message suggests
that version number "x.y.z" is a required parameter,
which is not true.

Solution:
Don't print version number when running
blktrace, blkparce, btt without parameters.

Signed-off-by: Edward Shishkin <edward@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/blktrace.c b/blktrace.c
index a67e1b8..660ad7a 100644
--- a/blktrace.c
+++ b/blktrace.c
@@ -493,7 +493,7 @@ static inline void pdc_nev_update(struct devpath *dpp, int cpu, int nevents)
 
 static void show_usage(char *prog)
 {
-	fprintf(stderr, "Usage: %s %s %s", prog, blktrace_version, usage_str);
+	fprintf(stderr, "Usage: %s %s", prog, usage_str);
 }
 
 /*