Fixed assertion error if ACK is received before INVITE transaction sends final response (malicious?). Also fixed misc warnings, and stress-tested on Quad Xeon

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@657 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip-apps/src/samples/sndtest.c b/pjsip-apps/src/samples/sndtest.c
index fc05d85..b2e8fe6 100644
--- a/pjsip-apps/src/samples/sndtest.c
+++ b/pjsip-apps/src/samples/sndtest.c
@@ -198,7 +198,7 @@
 }
 
 static pj_status_t rec_cb(void *user_data, pj_uint32_t timestamp,
-			  const void *input, unsigned size)
+			  void *input, unsigned size)
 {
 
     struct test_data *test_data = user_data;