Use secure allocator for RNG state

Author: sipa

src/random.cpp

@@ -19,6 +19,8 @@
 #include <chrono>
 #include <thread>
 
+#include <support/allocators/secure.h>
+
 #ifndef WIN32
 #include <fcntl.h>
 #include <sys/time.h>
@@ -351,8 +353,8 @@ RNGState& GetRNGState() noexcept
 {
     // This C++11 idiom relies on the guarantee that static variable are initialized
     // on first call, even when multiple parallel calls are permitted.
-    static std::unique_ptr<RNGState> g_rng{new RNGState()};
-    return *g_rng;
+    static std::vector<RNGState, secure_allocator<RNGState>> g_rng(1);
+    return g_rng[0];
 }
 }