Fix overflow warning #204
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Fix overflow warning #204
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Use sizeof to determine suitable string size for the dmidecode cmd buffer
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@martijnvanbrummelen Use sizeof to determine the size of the character array that we construct the dmidecode command in.
This is a better way to determine the array size as it's determined by the compiler. It also means that if the dmidecode keyword is added to the destination array size is automatically adjusted by the compiler.