Fix some stuff involving calls to memcpy and memset

The important parts of the patch were already applied through other updates.

(closes issue ASTERISK-19445)
Reported by: Makoto Dei
Patches:
	memset-memcpy-length.patch uploaded by Makoto Dei (license 5027)
........

Merged revisions 361210 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 361211 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@361212 65c4cc65-6c06-0410-ace0-fbb531ad65f3