citrus_utf5 module UTF-5 -> other encoding may causes EILSEQ.

[Takehiko NOZAKI]

related Issue #63, this fix uses null string "" for flush mbstate_t. but for UTF-5 encoding, L'\0' is not '\0' but 'G' is.

[Takehiko NOZAKI]

BUGFIX: Issue #69 -- citrus_utf5 module UTF-5 -> other encoding may causes EILSEQ.

→ <<cset 75e158382794>>

[Takehiko NOZAKI]

Revert "BUGFIX: Issue #69 -- citrus_utf5 module UTF-5 -> other encoding may causes EILSEQ."

This reverts commit 75e1583827942ce0c8527b4826a46f02a52b1c4a.

→ <<cset c539fd9b7077>>

[Takehiko NOZAKI]

previous fix is break other encoding conversion, so i revert and start to rework.

[Takehiko NOZAKI]

Duplicate of #63.