Fix coverity issues (#12598)

* Clamp LagN to non-zero values.

* Free static threads even on test failure.

* Initialize rusage.

* s/free/freez/

2 files changed, 2 insertions, 2 deletions

diff --git a/ml/Config.cc b/ml/Config.cc
index e08063b1cf..698c2a7c4b 100644
--- a/ml/Config.cc
+++ b/ml/Config.cc
@@ -66,7 +66,7 @@ void Config::readMLConfig(void) {
 
     DiffN = clamp(DiffN, 0u, 1u);
     SmoothN = clamp(SmoothN, 0u, 5u);
-    LagN = clamp(LagN, 0u, 5u);
+    LagN = clamp(LagN, 1u, 5u);
 
     RandomSamplingRatio = clamp(RandomSamplingRatio, 0.2, 1.0);
     MaxKMeansIters = clamp(MaxKMeansIters, 500u, 1000u);
diff --git a/ml/Host.h b/ml/Host.h
index ee2a805885..61d3b16257 100644
--- a/ml/Host.h
+++ b/ml/Host.h
@@ -84,8 +84,8 @@ private:
     std::pair<Dimension *, Duration<double>> findDimensionToTrain(const TimePoint &NowTP);
     void trainDimension(Dimension *D, const TimePoint &NowTP);
 
+    struct rusage ResourceUsage{};
     std::mutex ResourceUsageMutex;
-    struct rusage ResourceUsage;
 };
 
 class DetectableHost : public TrainableHost {