Int overflow in jp3d

[ichlubna]

When compressing a lot of slices (starting from 44 FullHD slices with 3 8bit components in our experiments) the rate values are high enough to cause an int overflow that leads to negative lengths and wrong results.

[stweil]

Do you know the exact code location where the overflow occurs?

If the problem can be reproduced, compiling with compiler option -ftrapv would help finding the problematic code.