Some cleanup, no functional change

* typedef base classes as 'inherited' and use that instead of the
  explicit base class name
* remove superfluous scopes in case blocks


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40420 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/package/hpkg/PackageWriterImpl.h

@@ -30,6 +30,8 @@ namespace BPrivate {
 struct hpkg_header;
 
 class PackageWriterImpl : public WriterImplBase {
+	typedef	WriterImplBase		inherited;
+
 public:
 								PackageWriterImpl(
 									BPackageWriterListener* listener);

headers/private/package/hpkg/RepositoryWriterImpl.h

@@ -32,6 +32,8 @@ struct hpkg_header;
 
 class RepositoryWriterImpl
 	: public WriterImplBase, private BPackageContentHandler {
+	typedef	WriterImplBase		inherited;
+
 public:
 								RepositoryWriterImpl(
 									BRepositoryWriterListener* listener,