repository writer: fix use of incorrect header size

The header size of the package file header was used, which resulted in
broken repository files.

headers/private/package/hpkg/WriterImplBase.h

@@ -100,7 +100,7 @@ protected:
 			typedef DoublyLinkedList<PackageAttribute> PackageAttributeList;
 
 protected:
-			status_t			Init(const char* fileName,
+			status_t			Init(const char* fileName, size_t headerSize,
 									const BPackageWriterParameters& parameters);
 
 			void				RegisterPackageInfo(

src/kits/package/hpkg/PackageWriterImpl.cpp

@@ -606,7 +606,8 @@ status_t
 PackageWriterImpl::_Init(const char* fileName,
 	const BPackageWriterParameters& parameters)
 {
-	status_t result = inherited::Init(fileName, parameters);
+	status_t result = inherited::Init(fileName, sizeof(hpkg_header),
+		parameters);
 	if (result != B_OK)
 		return result;
 

src/kits/package/hpkg/RepositoryWriterImpl.cpp

@@ -250,7 +250,8 @@ RepositoryWriterImpl::Finish()
 status_t
 RepositoryWriterImpl::_Init(const char* fileName)
 {
-	return inherited::Init(fileName, BPackageWriterParameters());
+	return inherited::Init(fileName, sizeof(hpkg_repo_header),
+		BPackageWriterParameters());
 }
 
 

src/kits/package/hpkg/WriterImplBase.cpp

@@ -243,7 +243,7 @@ WriterImplBase::~WriterImplBase()
 
 
 status_t
-WriterImplBase::Init(const char* fileName,
+WriterImplBase::Init(const char* fileName, size_t headerSize,
 	const BPackageWriterParameters& parameters)
 {
 	fParameters = parameters;
@@ -266,8 +266,8 @@ WriterImplBase::Init(const char* fileName,
 	fFileName = fileName;
 
 	// create heap writer
-	fHeapWriter = new PackageFileHeapWriter(fErrorOutput, FD(),
+	fHeapWriter = new PackageFileHeapWriter(fErrorOutput, FD(), headerSize,
-		sizeof(hpkg_header), fParameters.CompressionLevel());
+		fParameters.CompressionLevel());
 	fHeapWriter->Init();
 	fDataWriter = fHeapWriter->DataWriter();