[libgdata] [core] Add an assertion to back up a comment

[Philip Withnall <pwithnall src gnome org>]

commit 7231b18a03041139cf2309634c86aed3bc15e0b5
Author: Philip Withnall <philip tecnocode co uk>
Date:   Sat Aug 7 19:29:36 2010 +0100

    [core] Add an assertion to back up a comment

 gdata/gdata-buffer.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gdata/gdata-buffer.c b/gdata/gdata-buffer.c
index 8d73a28..f75bcf7 100644
--- a/gdata/gdata-buffer.c
+++ b/gdata/gdata-buffer.c
@@ -288,6 +288,8 @@ gdata_buffer_pop_data (GDataBuffer *self, guint8 *data, gsize length_requested,
 	/* If the requested length is still > 0, it must be < chunk->length, and chunk must != NULL (if it does, the cached total_length has
 	 * been corrupted somewhere). */
 	if (G_LIKELY (length_remaining > 0)) {
+		g_assert (chunk != NULL);
+
 		/* Copy the requested data to the output */
 		memcpy (data, chunk->data, length_remaining);
 		self->head_read_offset = length_remaining;