Merge pull request #1 from Kloen/bugfix/checksum-already-consumed-can…

…t-be-returned-as-found

fix: Don't return as completed a read if the checksum has already been consumed

extract_with_checksum.go

@@ -61,8 +61,8 @@ func (c *checksumCompleteCond) Complete(neko *nekoData, uncompressed []byte) boo
 	chSum := crc32.ChecksumIEEE(uncompressed)
 
 	for _, v := range c.maps {
-		if _, ok := v.checksums[chSum]; ok {
-			return true
+		if n, ok := v.checksums[chSum]; ok {
+			return n > 0
 		}
 	}