Replace Remaining Types

Somehow a few size_t slipped through https://github.com/official-stockfish/Stockfish/pull/6874

closes https://github.com/official-stockfish/Stockfish/pull/6897

No functional change

src/benchmark.cpp

@@ -18,6 +18,7 @@
 
 #include "benchmark.h"
 #include "numa.h"
+#include "misc.h"
 
 #include <cstdlib>
 #include <fstream>
@@ -483,7 +484,7 @@ BenchmarkSetup setup_benchmark(std::istream& is) {
 
     float totalTime = 0;
     for (const auto& game : BenchmarkPositions)
-        for (size_t i = 0; i < game.size(); ++i)
+        for (usize i = 0; i < game.size(); ++i)
             totalTime += float(getCorrectedTime(i + 1));
 
     float timeScaleFactor = static_cast<float>(desiredTimeS * 1000) / totalTime;