Fixed comments for File constructors
Merge pull request #226 from TsudaKageyu/file-comments

Fixed comments for File constructors
Fixed compilation error with GCC4.2
Merge pull request #228 from TsudaKageyu/gcc42

Fixed compilation error with GCC4.2
Fixed compilation error with GCC4.2
Merge pull request #229 from TsudaKageyu/gcc42-2

Fixed compilation error with GCC4.2