[aravis] tests: avoid a crash in camera-test when chunk are not used

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 5e521f50d129f68861137d59dd5c8d6e7f822a4b
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Fri Nov 28 16:14:01 2014 +0100

    tests: avoid a crash in camera-test when chunk are not used

 tests/arvcameratest.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/arvcameratest.c b/tests/arvcameratest.c
index cf8f3de..d4214ef 100644
--- a/tests/arvcameratest.c
+++ b/tests/arvcameratest.c
@@ -181,6 +181,7 @@ main (int argc, char **argv)
 
        data.buffer_count = 0;
        data.chunks = NULL;
+       data.chunk_parser = NULL;
 
        arv_g_thread_init (NULL);
        arv_g_type_init ();