src: suppress false coverity warning

Signed-off-by: Michael Dawson <mdawson@devrus.com>

PR-URL: nodejs#42284
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/api/environment.cc

@@ -141,8 +141,12 @@ void* DebuggingArrayBufferAllocator::Reallocate(void* data,
   Mutex::ScopedLock lock(mutex_);
   void* ret = NodeArrayBufferAllocator::Reallocate(data, old_size, size);
   if (ret == nullptr) {
-    if (size == 0)  // i.e. equivalent to free().
+    if (size == 0) {  // i.e. equivalent to free().
+      // suppress coverity warning as data is used as key versus as pointer
+      // in UnregisterPointerInternal
+      // coverity[pass_freed_arg]
       UnregisterPointerInternal(data, old_size);
+    }
     return nullptr;
   }