gsup_server: fix typo: s/omso_gsup_message/osmo_gsup_message/

Change-Id: I77eac6df9836f2361d87df7ba5ab6fc14ba06b1d
diff --git a/src/gsup_server.c b/src/gsup_server.c
index 888507c..830a5a7 100644
--- a/src/gsup_server.c
+++ b/src/gsup_server.c
@@ -461,7 +461,7 @@
 
 /**
  * Populate a gsup message structure with an Insert Subscriber Data Message.
- * All required memory buffers for data pointed to by pointers in struct omso_gsup_message
+ * All required memory buffers for data pointed to by pointers in struct osmo_gsup_message
  * must be allocated by the caller and should have the same lifetime as the gsup parameter.
  *
  * \param[out] gsup  The gsup message to populate.