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#55 zip30: several possible bugs

v1.0 (example)
open
nobody
None
5
2018-11-21
2018-11-21
No

Hello,
in the patch below, 3 possible bugs in ZIP30 are described.
The first one deals with small string buffer (fix is in the patch).
The second one deals with unchecked return value of zftello() function
* The third one deals with possibility of NULL pointer dereference.

Since I am not familiar enough with the zip source code, the 2nd and 3rd problems are only mentioned in the patch but not fixed.

Thanks,
JM

patch

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