FlatBuffersMemoryReader leaks

[john-wallace-apps]

In the generated FlatbuffersMemoryReader, the code reads:

    deinit {
        if let originalBuffer = originalBuffer,
            let pointer = originalBuffer.baseAddress {
            pointer.deinitialize(count: count)
        }
    }

Instead it should be:

    deinit {
        if let originalBuffer = originalBuffer,
            let pointer = originalBuffer.baseAddress {
            pointer.deallocate(capacity: count)
        }
    }

The deinitialize() method turns initialized memory into unintialized memory, it does not deallocate it.