Fix for building x64 target: void* is 64 bits, while unsigned int is still 32.
Fix for building x64 target: void* is 64 bits, while unsigned int is still 32.

BrewPi/firmware,BrewPi/firmware,BrewPi/firmware,etk29321/firmware,BrewPi/firmware,glibersat/firmware,glibersat/firmware,glibersat/firmware,glibersat/firmware,BrewPi/firmware,BrewPi/firmware,etk29321/firmware,etk29321/firmware,etk29321/firmware,glibersat/firmware,BrewPi/firmware,etk29321/firmware,glibersat/firmware,BrewPi/firmware,glibersat/firmware,etk29321/firmware