null check for delete override

Former-commit-id: a48b4cbdf24bfa5a1d13295c0202d1ed09115374

src/new.cpp

@@ -27,13 +27,16 @@ void *operator new(std::size_t size, const std::nothrow_t &) noexcept
     return zmalloc(size, MALLOC_LOCAL);
 }
 
+//need to do null checks for delete since the compiler can optimize out null checks in zfree
 void operator delete(void * p) noexcept
 {
+    if (p != nullptr)
         zfree(p);
 }
 
 void operator delete(void *p, std::size_t) noexcept
 {
+    if (p != nullptr)
         zfree(p);
 }