bench: Fix 32-bit compilation failure in addrman bench

src/bench/addrman.cpp

@@ -5,6 +5,7 @@
 #include <addrman.h>
 #include <bench/bench.h>
 #include <random.h>
+#include <util/check.h>
 #include <util/time.h>
 
 #include <optional>
@@ -110,7 +111,8 @@ static void AddrManGood(benchmark::Bench& bench)
      * we want to do the same amount of work in every loop iteration. */
 
     bench.epochs(5).epochIterations(1);
-    const size_t addrman_count{bench.epochs() * bench.epochIterations()};
+    const uint64_t addrman_count{bench.epochs() * bench.epochIterations()};
+    Assert(addrman_count == 5U);
 
     std::vector<std::unique_ptr<CAddrMan>> addrmans(addrman_count);
     for (size_t i{0}; i < addrman_count; ++i) {