#55 zip30: several possible bugs

[Jakub Martisko]

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