Preserves the timestamps of Buffers with FLAG_RTP_TIME, allowing the RTP timestamps to be set by the user.

git-svn-id: http://svn.code.sf.net/p/fmj/code/fmj@92 799b4810-d841-4bb4-a54b-9156a0c3e4cd
Fixes a failure to copy the existing array elements to the newly
allocated array while growing the arrays when an element is
inserted in the first position (i=0).

git-svn-id: http://svn.code.sf.net/p/fmj/code/fmj@93 799b4810-d841-4bb4-a54b-9156a0c3e4cd