tests: Assert fillrate > 0 in alsa-time-test

CID 1323592

assert that fillrate is strictly positive

src/tests/alsa-time-test.c

@@ -60,6 +60,7 @@ int main(int argc, char *argv[]) {
     dev = argc > 1 ? argv[1] : "front:0";
     cap = argc > 2 ? atoi(argv[2]) : 0;
     fillrate = argc > 3 ? atoi(argv[3]) : 1;
+    assert(fillrate > 0);
 
     samples = calloc(fillrate, CHANNELS*sizeof(uint16_t));
     assert(samples);