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fix crash when trying to generate icon for files <84 bytes
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@ -138,6 +138,9 @@ static uint8_t maskReplacement[][128] = {
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[fh seekToFileOffset:1024];
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NSData *checkHeader = [fh readDataOfLength:128];
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[fh closeFile];
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if (checkHeader == nil || checkHeader.length != 128) {
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return nil;
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}
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const unsigned char *chb = [checkHeader bytes];
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// determine type from header
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