Fix assertion.

prrt/time-sender.c

@@ -133,7 +133,7 @@ int main(int argc, char **argv) {
     uint32_t j = 0;
     uint16_t buffer_size = arguments.size;
     char* buf = calloc(buffer_size, sizeof(char));
-	assert(sizeof(buf) >= 2* sizeof(struct timespec) + 20);
+	assert(buffer_size * sizeof(char) >= 2* sizeof(struct timespec) + 20);
     while (j < rounds) {
 		struct timespec now;
 		clock_gettime(CLOCK_REALTIME, &now);