Fix segmentation fault
- check if L Field is at least 3 to avoid crash (MBDOC48.PDF, page 23)
Add libmbus1-dbg package.
add exploit for invalid length
Merge pull request #32 from lategoodbye/master

Fix segmentation fault
Merge pull request #33 from aleax/debian

Add libmbus1-dbg package.
add new helper functions to check primary and secondary addresses
replace address parameter checks with new helper functions
replace address parameter checks with new helper functions
fix logic of secondary address check
Merge pull request #34 from lategoodbye/master

Address check functions