decode: replace strcpy with strncpy where possible

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
feed: replace strcpy with strncpy where possible

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
output: replace strcpy with strncpy where possible

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
functions: replace strcpy with strncpy where possible

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
decode: pass size into functions decode_multiple_string & get_decoded_ett

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
functions: require callers of decode_multiple_string() to pass sizeof_text

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>