Add callback call in the resizer function.#38

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sosfos wants to merge 3 commits intohonza:masterfrom

Commits on Jan 16, 2019

call the callback if it is exists when error in resizer function. Otherwise the exception might cannot be caught outside.
Zhiquan
committed
not thow the error if we have callback called.
Zhiquan
committed

Commits on Jan 17, 2019

provide the file instance for calling callback.
Zhiquan
committed