fix signed/unsigned compiler warning

diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc
index f46b9263c8bdde6def6c9d778164245484a9ff93..47632f486dfdb2c7457c5873252458d41e801dac 100644 (file)
--- a/libs/backends/dummy/dummy_audiobackend.cc
+++ b/libs/backends/dummy/dummy_audiobackend.cc
@@ -1139,7 +1139,7 @@ DummyAudioBackend::main_process_thread ()
        manager.registration_callback();
        manager.graph_order_callback();
 
-       uint64_t clock1, clock2;
+       int64_t clock1, clock2;
        clock1 = _x_get_monotonic_usec();
        while (_running) {