ensure C++ compilation on windows

test/main-override.cpp

@@ -23,14 +23,14 @@ public:
 
 
 int main() {
-  mi_version();
+  mi_stats_reset();  // ignore earlier allocations
   atexit(free_p);
   void* p1 = malloc(78);
   void* p2 = mi_malloc_aligned(16,24);
   free(p1);
   p1 = malloc(8);
   char* s = mi_strdup("hello\n");
-  mi_free(p2);
+  free(p2);
   p2 = malloc(16);
   p1 = realloc(p1, 32);
   free(p1);
@@ -39,7 +39,7 @@ int main() {
   Test* t = new Test(42);
   delete t;
   t = new (std::nothrow) Test(42);
-  delete t;
+  delete t;  
   return 0;
 }