[libc][time] solve the problem which the os tick can be calculated wrongly because the local variable was not initialized.
@@ -689,7 +689,7 @@ int rt_timespec_to_tick(const struct timespec *time)
{
int tick;
int nsecond, second;
- struct timespec tp;
+ struct timespec tp = {0};
RT_ASSERT(time != RT_NULL);
