Fix stream copying

src/main/java/eu/mikroskeem/uurimustoo/algoritmidetest/compressors/CompressZip.java

@@ -21,7 +21,7 @@ public class CompressZip extends AbstractCompressor {
             out.putNextEntry(ze);
             byte[] buf = new byte[8192];
             int s;
-            while((s = inputStream.read()) != -1){
+            while((s = inputStream.read(buf)) != -1){
                 out.write(buf, 0, s);
             }
             out.closeEntry();