decoder: don't decrement remaining in nanocbor_leave_container()

[benpicco]

The remaining value has already been decremented by _enter_container(), no need to decrement it twice.

echo v2NzZXECY2NtZIe/Y2xlZPT/v2VkZWxheRkB9P+/ZGVjaG9pSSdtIGRvbmUh/79jbGVk9f+/ZWRlbGF5GQH0/79jbGVk9P+/ZGVjaG9tTm93IEknbSBkb25lIf9jY2Zn9v8= | base64 -d | bin/fuzztest`

master

Reading 98 bytes from stdin
advancing
parsing cbor
{
  "seq": 2,
  "cmd": [
    {
      "led": False,
    },
    {
      "delay": 500,
    },
    {
      "echo": "I'm done!",
    },
    {
      "led": True,
    },
  ],
  {
    "delay": 500,
  }: {
    "led": False,
  },
  {
    "echo": "Now I'm done!",
  }: "cfg",
  NULL: Unsupported type
Err
},
Done parsing cbor

this patch

Reading 98 bytes from stdin
advancing
parsing cbor
{
  "seq": 2,
  "cmd": [
    {
      "led": False,
    },
    {
      "delay": 500,
    },
    {
      "echo": "I'm done!",
    },
    {
      "led": True,
    },
    {
      "delay": 500,
    },
    {
      "led": False,
    },
    {
      "echo": "Now I'm done!",
    },
  ],
  "cfg": NULL,
},
Done parsing cbor

[DanielLockau-MLPA]

@bergzand I just noticed Ben has published this patch yesterday. Please also consider #53 wrt. the described issue.

[benpicco]

closing this in favor of #54