Prevent offset wrapping in fd_pread
#258
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This commit inserts a bounds check in `fd_pread` for the `offset` parameter. This is necessary because an implicit unsigned-to-signed integer conversion is performed when `uv_fs_read` is called. Such a conversion results in implementation-defined behavior. One such behavior is the offset wrapping. fixes nodejs#257
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This commit inserts a bounds check in
fd_preadfor theoffsetparameter. This is necessary because an implicit unsigned-to-signed integer conversion is performed whenuv_fs_readis called. Such a conversion results in implementation-defined behavior. One such behavior is the offset wrapping.fixes #257