dry common code

src/encoding/blocks/compressed.rs

@@ -6,6 +6,8 @@ pub fn compress_block(data: &[u8], output: &mut Vec<u8>) {
     let mut writer = BitWriter::from(output);
     compress_literals(data, &mut writer);
     //raw_literals(data, &mut writer);
+    //sequences
+    writer.write_bits(0u8, 8);
     writer.flush();
 }
 
@@ -16,9 +18,6 @@ fn raw_literals(literals: &[u8], writer: &mut BitWriter<&mut Vec<u8>>) {
     writer.write_bits(0b11u8, 2);
     writer.write_bits(literals.len() as u32, 20);
     writer.append_bytes(literals);
-
-    //sequences
-    writer.write_bits(0u8, 8);
 }
 
 fn compress_literals(literals: &[u8], writer: &mut BitWriter<&mut Vec<u8>>) {
@@ -47,7 +46,4 @@ fn compress_literals(literals: &[u8], writer: &mut BitWriter<&mut Vec<u8>>) {
     };
     let encoded_len = (writer.index() - index_before) / 8;
     writer.change_bits(size_index, encoded_len as u64, size_bits);
-
-    //sequences
-    writer.write_bits(0u8, 8);
 }