Clean up error blurb code (no longer needed).

Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>

src/TODO

@@ -2,12 +2,9 @@ possible improvements:
 - dynamic bit strength
 
 streaming:
-- need explicit Error objects
 - logging
-- raw streams
+- raw streams -> document in -h?
 - mp3 indexing / detect (resync-limit)
-- stdio error handling
-- document in README
 - final documentation
 - --snr
 - --quiet

src/stdoutwavoutputstream.hh

@@ -8,7 +8,6 @@
 
 class StdoutWavOutputStream : public AudioOutputStream
 {
-  std::string m_error_blurb;
   int         m_bit_depth = 0;
   int         m_sample_rate = 0;
   int         m_n_channels = 0;
@@ -32,11 +31,6 @@ public:
   int  sample_rate() const override;
   int  bit_depth() const override;
   int  n_channels() const override;
-
-  const char *error_blurb() const
-  {
-    return m_error_blurb.c_str();
-  }
 };
 
 #endif

src/teststream.cc

@@ -24,9 +24,10 @@ main (int argc, char **argv)
       fprintf (stderr, "teststream: open input failed: %s\n", err.message());
       return 1;
     }
-  if (!out.open (in.n_channels(), in.sample_rate(), 16, in.n_frames()))
+  err = out.open (in.n_channels(), in.sample_rate(), 16, in.n_frames());
+  if (err)
     {
-      fprintf (stderr, "teststream: open output failed: %s\n", out.error_blurb());
+      fprintf (stderr, "teststream: open output failed: %s\n", err.message());
       return 1;
     }
   vector<float> samples;