Krzysztof Blazewicz 5a5449d4eb extmod/modbtree: do CHECK_ERROR after __bt_seq() ...

In `btree_seq()`, when `__bt_seq()` gets called with invalid
`flags` argument it will return `RET_ERROR` and it won't
initialize `val`. If field `data` of uninitialized `val`
is passed to `mp_obj_new_bytes()` it causes a segfault.

2016-08-24 01:31:16 +03:00

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