test suite: Don't insist on property completions if synclient -l fails

Author: scop

test/lib/completions/synclient.exp

@@ -11,7 +11,15 @@ proc teardown {} {
 setup
 
 
-assert_complete_any "synclient "
+assert_complete_any "synclient -"
+sync_after_int
+
+
+# synclient -l may error out with e.g.
+# Couldn't find synaptics properties. No synaptics driver loaded?
+if {[assert_exec {synclient -l} "" "" "unsupported"]} {
+    assert_complete_any "synclient "
+}
 sync_after_int