Redeclaring C structs should error #38

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<!-- You can use v doctor to fill up the next fields --> V version: recent V OS: Windows 8

What did you do?

struct C.dirent {
    d_name [256]char
}

struct C.dirent {
    d_name byteptr
}

What did you expect to see? Error, redeclaration

What did you see instead? No error