Don't refine SODIUM_C99 if it has already been defined
Don't refine SODIUM_C99 if it has already been defined

eburkitt/libsodium,eburkitt/libsodium,pmienk/libsodium,Payshares/libsodium,rustyhorde/libsodium,Payshares/libsodium,rustyhorde/libsodium,rustyhorde/libsodium,pmienk/libsodium,Payshares/libsodium,eburkitt/libsodium,rustyhorde/libsodium,pmienk/libsodium