[chbot] snprintf

[Bevin Brett]

Getting rid of the struct and the indexing, what you have is

    char ssid[30];
    char buf[100]

    snprintf (buf, sizeof (ssid), "SSID %s\n", ssid);

which is a request to write 5 chars ("SSID ") followed by any number of chars ending in a NUL  (perhaps overrunning the end of ssid if there are no NUL in it) followed by \n and a trailing NUL into the first upto 30 characters of buf.      The warning is assuming (incorrectly) that ssid will contain less than 30 non-NULL characters, hence decides may need upto 37 characters (should have been 36) (5 + 29 + 1 + 1) and you have only supplied 30

/Bevin
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