Fix some stuff involving calls to memcpy and memset

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