synclient: support -? for usage

man page and help claim we support this, so let's do so

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/tools/synclient.c b/tools/synclient.c
index bb9be01..bd7cb61 100644
--- a/tools/synclient.c
+++ b/tools/synclient.c
@@ -483,7 +483,7 @@ main(int argc, char *argv[])
         dump_settings = 1;
 
     /* Parse command line parameters */
-    while ((c = getopt(argc, argv, "lV")) != -1) {
+    while ((c = getopt(argc, argv, "lV?")) != -1) {
         switch (c) {
         case 'l':
             dump_settings = 1;
@@ -491,6 +491,7 @@ main(int argc, char *argv[])
         case 'V':
             printf("%s\n", VERSION);
             exit(0);
+        case '?':
         default:
             usage();
         }