Most importantly, callback fields in submessages were being overwritten with garbage, causing segfaults. Additionally, converted PB_LTYPE_FIXED to PB_LTYPE_FIXED32 and PB_LTYPE_FIXED64. This makes the interface a bit easier to use, and in addition runs faster. git-svn-id: https://svn.kapsi.fi/jpa/nanopb@975 e3a754e5-d11d-0410-8d38-ebb782a927b9