Fix declarations after statements
Remove some !rig checks...we either don't need them or need them everywhere with a new error code
If you pass a NULL rig you get what you deserve :-)
This found tons of errors in rig_debug statements
So this patch cleans up all the files that were producing warnings or errors
This should fix a few segfaults when running with debug turned on
Workaround for fldigi
fldigi treats zero frequency as error and disables hamlib.
So if the device rports zero frequency return 1 Hz instead,
so the user can switch to the favored frequency