Fix passing NULL pointer to printf as string. #522
Merged
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Doing this is undefined behaviour, and causes crashes with certain
compilers/C libraries. The LOG_ARG macro is defined to function as
printf.
This was causing issues when running wakaama with logs enabled.
I went through all of the LOG_ARG calls, and wrapped any string args
which could be NULL in a helper macro which swaps them for an empty
string.
Signed-off-by: Ciaran Woodward c.woodward@cascoda.com