[Qemu-trivial] [PULL 08/19] configure: fix trace backend check

[Michael Tokarev]

From: Marc-André Lureau <address@hidden>

Found thanks to shellcheck!

Signed-off-by: Marc-André Lureau <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Michael Tokarev <address@hidden>
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 83b40fc..44ac9ab 100755
--- a/configure
+++ b/configure
@@ -4817,7 +4817,7 @@ echo "libcap-ng support $cap_ng"
 echo "vhost-net support $vhost_net"
 echo "vhost-scsi support $vhost_scsi"
 echo "Trace backends    $trace_backends"
-if test "$trace_backend" = "simple"; then
+if have_backend "simple"; then
 echo "Trace output file $trace_file-<pid>"
 fi
 if test "$spice" = "yes"; then
-- 
2.1.4