Running RTKRCV with args "-s" causes "Segmentation fault" error

[gnsslee]

Hi，

When call startsvr with NULL pointer , the pointer is referenced latter, which causes "Segmentation fault" error.
when I change the NULL pointer to con[0]->vt, the rtk server starts rightly, but when "shutdown" command is executed，error：“malloc(): unsorted double linked list corrupted” occurs. The call stack shows that the program stops in function “savenav” on line 2957 or 2083.

Thanks！

[gdelmondo]

Hi,
the following pull request closes the issue
#681

Regards,
Giorgio