Bug in bmp24

[kaitz]

On mc.tar file bmp24 fails to detect input correctly, so when decompressing a file we fail. On decompression side we consume more from archive then needed. No checks are present for that.
Result is that next stream model length is arbitrary and model is decompressed from random data.
Output by the archive: block update or main not defined

Archive only contains decompressed size of stream, so we cant manually re-seek to next stream.