(closes issue #10526)

Reported by: sinistermidget
Revert commit from issue #10355 and return timestamp skew to 640. 


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@80255 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/rtp.c

@@ -57,7 +57,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/unaligned.h"
 #include "asterisk/utils.h"
 
-#define MAX_TIMESTAMP_SKEW	120
+#define MAX_TIMESTAMP_SKEW	640
 
 #define RTP_SEQ_MOD     (1<<16) 	/*!< A sequence number can't be more than 16 bits */
 #define RTCP_DEFAULT_INTERVALMS   5000	/*!< Default milli-seconds between RTCP reports we send */