Fix WinzipAesCryptoStream potentially not getting disposed

src/SharpCompress/Common/Zip/ZipFilePart.cs

@@ -70,17 +70,12 @@ protected Stream CreateDecompressionStream(Stream stream, ZipCompressionMethod m
         {
             case ZipCompressionMethod.None:
             {
-                if (stream is ReadOnlySubStream)
+                if (Header.CompressedSize is 0)
                 {
-                    return stream;
+                    return new DataDescriptorStream(stream);
                 }
 
-                if (Header.CompressedSize > 0)
-                {
-                    return new ReadOnlySubStream(stream, Header.CompressedSize);
-                }
-
-                return new DataDescriptorStream(stream);
+                return stream;
             }
             case ZipCompressionMethod.Shrink:
             {

tests/SharpCompress.Test/Zip/ZipReaderTests.cs

@@ -379,4 +379,21 @@ public void Zip_Uncompressed_64bit()
 
         Assert.Equal(4, x);
     }
+
+    [Fact]
+    public void Zip_Uncompressed_Encrypted_Read()
+    {
+        using var archive = ArchiveFactory.Open(
+            Path.Combine(TEST_ARCHIVES_PATH, "Zip.none.encrypted.zip"),
+            new ReaderOptions { Password = "test" }
+        );
+        using var reader = archive.ExtractAllEntries();
+        reader.MoveToNextEntry();
+        Assert.Equal("first.txt", reader.Entry.Key);
+        Assert.Equal(199, reader.Entry.Size);
+        reader.OpenEntryStream().Dispose();
+        reader.MoveToNextEntry();
+        Assert.Equal("second.txt", reader.Entry.Key);
+        Assert.Equal(197, reader.Entry.Size);
+    }
 }