fix compiler warning in msvc

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10343 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_rtp.c

@@ -1257,7 +1257,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 {
 	switch_size_t bytes = 0;
 	switch_status_t status;
-	uint8_t check = 0;
+	int check = 0;
 	stfu_frame_t *jb_frame;
 	int ret = -1;
 	int sleep_mss = 1000;