PJSUA_PRES_TIMER was set to two seconds! (thanks Paul Levin)

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@1404 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsua-lib/pjsua_pres.c b/pjsip/src/pjsua-lib/pjsua_pres.c
index bc650e5..5a90cb1 100644
--- a/pjsip/src/pjsua-lib/pjsua_pres.c
+++ b/pjsip/src/pjsua-lib/pjsua_pres.c
@@ -23,7 +23,7 @@
 #define THIS_FILE   "pjsua_pres.c"
 
 #ifndef PJSUA_PRES_TIMER
-#   define PJSUA_PRES_TIMER	2
+#   define PJSUA_PRES_TIMER	120
 #endif