Fixed up testing.

lib/flac/flac_test.go

@@ -1,7 +1,6 @@
 package flac
 
 import (
-	"log"
 	"testing"
 )
 
@@ -10,5 +9,13 @@ func TestGetMetadata(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	log.Printf("%v", md)
+	expected := Metadata{
+		SampleRate: 48000,
+		BPS:        16,
+		Channels:   2,
+		NumSamples: 174564,
+	}
+	if md != expected {
+		t.Fatalf("%v != %v", md, expected)
+	}
 }