use same signedness var type for ptime.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4117 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/mod_sofia.c

@@ -684,7 +684,7 @@ static void set_local_sdp(private_object_t *tech_pvt, char *ip, uint32_t port, c
 {
 	char buf[1024];
 	switch_time_t now = switch_time_now();
-    uint32_t ptime = 0;
+    int ptime = 0;
 
 	if (!force && !ip && !sr && switch_test_flag(tech_pvt, TFLAG_NOMEDIA)) {
 		return;