check malloc return value for NULL and update docs #361
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ZXShady
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`sfFtpDirectoryResponse_getDirectory` can fail and return NULL becuase 'strdup' returns null on failure but `sfFtpDirectoryResponse_getDirectoryUnicode` didn't and just had UB due not checking return value of malloc. typing NULL in the docs made me age 30 years btw
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ChrisThrasher
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sfFtpDirectoryResponse_getDirectorycan fail and return NULL becuase 'strdup' returns null on failure and it didn't mention it in the docs butsfFtpDirectoryResponse_getDirectoryUnicodedidn't and just had UB due not checking return value of malloc.typing
NULLinstead ofnullptrin the docs made me age 30 years btw