darwin: nanoseconds to centi-seconds minor improvement

Avoid the use of floating point division when integer division can do
it.
A follow-up of commit 9944d55.

darwin/DarwinProcess.c

@@ -275,6 +275,11 @@ static void DarwinProcess_updateCmdLine(const struct kinfo_proc* k, Process* pro
    Process_updateCmdline(proc, k->kp_proc.p_comm, 0, strlen(k->kp_proc.p_comm));
 }
 
+// Converts nanoseconds to hundredths of a second (centiseconds) as needed by the "time" field of the Process struct.
+static inline unsigned long long int nanosecondsToCentiseconds(uint64_t nanoseconds) {
+   return nanoseconds / 10000000U;
+}
+
 static char* DarwinProcess_getDevname(dev_t dev) {
    if (dev == NODEV) {
       return NULL;
@@ -383,7 +388,7 @@ void DarwinProcess_setFromLibprocPidinfo(DarwinProcess* proc, DarwinProcessTable
    Process_updateCPUFieldWidths(proc->super.percent_cpu);
 
    proc->super.state = pti.pti_numrunning > 0 ? RUNNING : SLEEPING;
-   proc->super.time = total_current_time_ns / 1e7;
+   proc->super.time = nanosecondsToCentiseconds(total_current_time_ns);
    proc->super.nlwp = pti.pti_threadnum;
    proc->super.m_virt = pti.pti_virtual_size / ONE_K;
    proc->super.m_resident = pti.pti_resident_size / ONE_K;