contlen is of type size_t. Depending on the platform, this may have a different size than unsigned int. According to the RIOT encoding conventions, size_t variables should be converted to unsigned in printouts if possible, since %zu' is not supported bynewlib-nano`.
Contribution description
Minor change to fix compiler warning.
contlenis of typesize_t. Depending on the platform, this may have a different size thanunsigned int. According to the RIOT encoding conventions,size_tvariables should be converted tounsignedin printouts if possible, since%zu' is not supported bynewlib-nano`.