Security: Invalid write in FSS processing functions due to improper allocation size.

Security: Invalid write in FSS processing functions due to improper allocation size.

The start and stop ranges are inclusive.
This means that the size is (stop - start) + 1.

The problems happens where the code is adding additional digits to represent end of line or other special characters.
When this is added, I seem to have forgotten to add the additional numbers to the + 1 and instead replaced the + 1.
This results in the size being potentially short by a single character and thus an invalid write is possible.