[NTOSKRNL] Noisily dereference mapped VACB on cache release.

It seems that on process killing, some VACB may be deleted while
still mapped. With current reference counting, they will actually
not be deleted, but leaked, and an ASSERT will be triggered.

CORE-14578

ntoskrnl/cc/view.c

@@ -1106,6 +1106,12 @@ CcRosDeleteFileCache (
                 KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
                 DPRINT1("Freeing dirty VACB\n");
             }
+            if (current->MappedCount != 0)
+            {
+                current->MappedCount = 0;
+                NT_VERIFY(CcRosVacbDecRefCount(current) > 0);
+                DPRINT1("Freeing mapped VACB\n");
+            }
             InsertHeadList(&FreeList, &current->CacheMapVacbListEntry);
 
             KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);