[libgsf] Fix another "Result of operation is garbage or undefined" detected by clang

[J.H.M. Dassen (Ray) <jdassen src gnome org>]

commit 9159c48be10f008f4bf06a2d0811ba8f327bcb1a
Author: J.H.M. Dassen (Ray) <jdassen debian org>
Date:   Thu Aug 19 22:57:12 2010 +0200

    Fix another "Result of operation is garbage or undefined" detected by clang

 gsf/gsf-msole-utils.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gsf/gsf-msole-utils.c b/gsf/gsf-msole-utils.c
index 83b5bec..28c56a9 100644
--- a/gsf/gsf-msole-utils.c
+++ b/gsf/gsf-msole-utils.c
@@ -1526,6 +1526,8 @@ msole_metadata_write_section (WritePropState *state, gboolean user)
 	} else
 		i = 1;
 
+	offsets[i].offset = gsf_output_tell (state->out);
+
 	/* 2) props */
 	for (; ptr != NULL && i < count ; ptr = ptr->next, i++) {
 		offsets[i].offset = gsf_output_tell (state->out);