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684098fac3
The Windows implementation of dialogs use the Win32 API, which expects the file filters to have null bytes as separator, and two null bytes at the end of the filter list. To help with string manipulation, the internal code uses 0x01 bytes instead of null bytes, and converts all 0x01 bytes into null bytes at the last moment. If someone decides to put two consecutive 0x01 bytes in their filter names, the code might mistakenly pick them up and convert them to null bytes, leading to Windows failing to pick up later filters. In practice, this is probably not so bad, since it requires someone to have control over file filters already, and allows at most ignoring the following file filters. It is also unlikely to happen by accident since 0x01 is not printable. This commit fixes that by replacing all the 0x01 bytes with the space character.