Fix segfaults when parsing bdiff hunks in mpatch.decode() and .patchedsize()
- fix off by 11 when checking if there are more hunks (found by Maris Fogels)
- bail out if start is greater than end
- check if new hunk starts after start/end/len block of current hunk as
the pointer can wrap around on very large values, reproducible with
import mpatch; mpatch.patchedsize(12, 'x'*12)
command line templates: add formatnode filter
This will print a full hash node with --debug and a short one otherwise.
Use it with some default templates and in map-cmdline.default to print
the parents. This should fix
issue538.