Fix various test-suite regression by commit r5896 which get caused by a segfault.
Fix various test-suite regression by commit r5896 which get caused by a
segfault.

Due to a missing initization by NULL of an OSyncError *struct



git-svn-id: e31799a7ad59d6ea355ca047c69e0aee8a59fcd3@5897 53f5c7ee-bee3-0310-bbc5-ea0e15fffd5e

luizluca/opensync-luizluca,luizluca/opensync-luizluca