File cdrdao-build.patch of Package cdrdao

--- trackdb/FormatConverter.h
+++ trackdb/FormatConverter.h
@@ -29,7 +29,7 @@
 
 // Quick abstract class declarations. Format converters should derive
 // their own FormatSupport and FormatSupportManager.
-
+class Toc;
 class FormatSupport
 {
  public: