Hasitem filter cannot detect maps

The hasitem filter is unable to detect any used maps

Steps to Reproduce:

1. Go to the creative menu, and give your self a map
2. Fill the map
3. Use /testfor @a[hasitem=\{item=map}]

Observed Results:

Game does not detect map.

Expected Results:

Game should detect maps normally.

Notes:

This bug also cannot detect "filled_map"