Fixed miscellaneous compile warnings/errors when built with C++ mode

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@1929 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjnath/src/pjturn-srv/auth.c b/pjnath/src/pjturn-srv/auth.c
index 0f7e699..d2527df 100644
--- a/pjnath/src/pjturn-srv/auth.c
+++ b/pjnath/src/pjturn-srv/auth.c
@@ -102,7 +102,7 @@
 
     for (i=0; i<PJ_ARRAY_SIZE(g_cred); ++i) {
 	if (pj_stricmp2(username, g_cred[i].username) == 0) {
-	    *data_type = 0;
+	    *data_type = PJ_STUN_PASSWD_PLAIN;
 	    *data = pj_str(g_cred[i].passwd);
 	    return PJ_SUCCESS;
 	}