Working on QRA64 sync, snr estimates, etc., for QRA64 decoder.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7321 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

lib/decoder.f90

@@ -249,7 +249,7 @@ contains
     if(ft.ge.80) then
        nft=ft-100
        csync=': '
-       if(snr.gt.-30 .or. nft.ge.0) csync=':*'
+       if(sync.ge.float(minsync) .or. nft.ge.0) csync=':*'
        if(nft.lt.0) then
           write(*,1009) params%nutc,snr,dt,freq,csync,decoded
        else