Add the ability to parse '1' in parse_vfo for gpredict 'S 1 1' and 'S 0 1' command

https://github.com/Hamlib/Hamlib/issues/1362

src/misc.c

@@ -625,6 +625,7 @@ static const struct
     { RIG_VFO_NONE, "None" },
     { RIG_VFO_OTHER, "otherVFO" },
     { RIG_VFO_ALL, "AllVFOs" },
+    { RIG_VFO_A, "1" }, // to make gpredict happy in set_toggle
     { 0xffffffff, "" },
 };