Fix use of wrong internal variable

src/frame/decompress.rs

@@ -106,6 +106,11 @@ impl<R: io::Read> FrameDecoder<R> {
         self.r
     }
 
+    /// Returns the total number of uncompressed bytes read so far
+    pub fn total_out(&self) -> u64 {
+        self.content_len
+    }
+
     fn read_frame_info(&mut self) -> Result<usize, io::Error> {
         let mut buffer = [0u8; MAX_FRAME_INFO_SIZE];
 
@@ -347,12 +352,6 @@ impl<R: io::Read> FrameDecoder<R> {
         }
         self.read_block()
     }
-
-    /// Returns the total number of uncompressed bytes read so far
-    pub fn total_out(&self) -> usize {
-        // TODO: confirm if self.dst_start or self.ext_dict_offset is the correct one here
-        self.dst_start
-    }
 }
 
 impl<R: io::Read> io::Read for FrameDecoder<R> {