Merge #14093: tests: Fix accidental trunction from int to bool

1cc58978b7 tests: Fix accidental trunction from int to bool (practicalswift)

Pull request description:

  Fix accidental trunction from `int` to `bool`.

  Context: https://github.com/bitcoin/bitcoin/pull/14086#issuecomment-416610313

Tree-SHA512: 72d209f892e580afa9c295174c206ea5ba764ff9e03613cd9bc57fd0d7118e895ee44d96db90930a29c0b4de7f51dc00101a1b32ba6b46576d34e089ff5482ba

src/test/scheduler_tests.cpp

@@ -54,7 +54,7 @@ BOOST_AUTO_TEST_CASE(manythreads)
 
     boost::mutex counterMutex[10];
     int counter[10] = { 0 };
-    FastRandomContext rng(42);
+    FastRandomContext rng{/* fDeterministic */ true};
     auto zeroToNine = [](FastRandomContext& rc) -> int { return rc.randrange(10); }; // [0, 9]
     auto randomMsec = [](FastRandomContext& rc) -> int { return -11 + (int)rc.randrange(1012); }; // [-11, 1000]
     auto randomDelta = [](FastRandomContext& rc) -> int { return -1000 + (int)rc.randrange(2001); }; // [-1000, 1000]