containers minimum elements, windows memory leaks

libs/main/system/pisystemmonitor.cpp

@@ -356,6 +356,7 @@ void PISystemMonitor::run() {
 
 void PISystemMonitor::gatherThread(llong id) {
 	PISystemMonitor::ThreadStats ts;
+	if (id == 0) return;
 	ts.id = id;
 #ifdef MICRO_PIP
 	ts.name = tbid.value(id, "<PIThread>");
@@ -386,11 +387,12 @@ void PISystemMonitor::gatherThread(llong id) {
 	PISystemTime ct = PISystemTime::current();
 	FILETIME times[4];
 	HANDLE thdl = OpenThread(THREAD_QUERY_INFORMATION, FALSE, DWORD(id));
-	if (thdl == NULL) {
+	if (!thdl) {
 		piCout << "[PISystemMonitor] gatherThread(" << id << "):: OpenThread() error:" << errorString();
 		return;
 	}
 	if (GetThreadTimes(thdl, &(times[0]), &(times[1]), &(times[2]), &(times[3])) == 0) {
+		CloseHandle(thdl);
 		piCout << "[PISystemMonitor] gatherThread(" << id << "):: GetThreadTimes() error:" << errorString();
 		return;
 	}