Fixed pjnath build warnings/errors on Linux

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@1112 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsua-lib/pjsua_call.c b/pjsip/src/pjsua-lib/pjsua_call.c
index b0e420e..1494276 100644
--- a/pjsip/src/pjsua-lib/pjsua_call.c
+++ b/pjsip/src/pjsua-lib/pjsua_call.c
@@ -2086,8 +2086,8 @@
 				       pj_status_t status)
 {
     pjsua_call *call;
-    pjmedia_sdp_session *local_sdp;
-    pjmedia_sdp_session *remote_sdp;
+    const pjmedia_sdp_session *local_sdp;
+    const pjmedia_sdp_session *remote_sdp;
 
     PJSUA_LOCK();
 
diff --git a/pjsip/src/pjsua-lib/pjsua_core.c b/pjsip/src/pjsua-lib/pjsua_core.c
index d01a02b..a002600 100644
--- a/pjsip/src/pjsua-lib/pjsua_core.c
+++ b/pjsip/src/pjsua-lib/pjsua_core.c
@@ -653,8 +653,6 @@
 }
 
 
-static pj_status_t resolve_stun_server(pj_bool_t use_dns_srv);
-
 /*
  * Callback function to receive notification from the resolver
  * when the resolution process completes.
diff --git a/pjsip/src/pjsua-lib/pjsua_media.c b/pjsip/src/pjsua-lib/pjsua_media.c
index eefcb2d..0d4f6b2 100644
--- a/pjsip/src/pjsua-lib/pjsua_media.c
+++ b/pjsip/src/pjsua-lib/pjsua_media.c
@@ -771,8 +771,8 @@
 
 
 pj_status_t pjsua_media_channel_update(pjsua_call_id call_id,
-				       pjmedia_sdp_session *local_sdp,
-				       pjmedia_sdp_session *remote_sdp)
+				       const pjmedia_sdp_session *local_sdp,
+				       const pjmedia_sdp_session *remote_sdp)
 {
     int prev_media_st = 0;
     pjsua_call *call = &pjsua_var.calls[call_id];