Fix warnings in test/std/language.support

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@242624 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/language.support/support.dynamic/alloc.errors/new.handler/new_handler.pass.cpp

@@ -10,10 +10,14 @@
 // test new_handler
 
 #include <new>
+#include <type_traits>
+#include <cassert>
 
 void f() {}
 
 int main()
 {
+    static_assert(std::is_same<std::new_handler, void(*)()>::value, "");
     std::new_handler p = f;
+    assert(p == &f);
 }

test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array.pass.cpp

@@ -38,7 +38,8 @@ int main()
     std::set_new_handler(new_handler);
     try
     {
-        void*volatile vp = operator new[] (std::numeric_limits<std::size_t>::max());
+        void* volatile vp = operator new[] (std::numeric_limits<std::size_t>::max());
+        ((void)vp);
         assert(false);
     }
     catch (std::bad_alloc&)

test/std/language.support/support.dynamic/new.delete/new.delete.single/new.pass.cpp

@@ -39,6 +39,7 @@ int main()
     try
     {
         void* vp = operator new (std::numeric_limits<std::size_t>::max());
+        ((void)vp);
         assert(false);
     }
     catch (std::bad_alloc&)