001-switch-buffer.patch

diff --git a/src/switch_buffer.c b/src/switch_buffer.c
index 58e5244..95b49ee 100644
--- a/src/switch_buffer.c
+++ b/src/switch_buffer.c
@@ -297,7 +297,7 @@
 	switch_assert(buffer->data != NULL);
 
 	if (!datalen) {
-		return buffer->used;
+		return buffer->used ? buffer->used : 1;
 	}
 
 	actual_freespace = buffer->datalen - buffer->actually_used;