Added default cookie Close() implementation

Added trivial implementation for AttributeCookie::Close() and
AttributeDirectoryCookie::Close() and removed the identical Close()
implementations in derived classes.

src/add-ons/kernel/file_systems/packagefs/AttributeCookie.cpp

@@ -10,3 +10,10 @@
 AttributeCookie::~AttributeCookie()
 {
 }
+
+
+status_t
+AttributeCookie::Close()
+{
+	return B_OK;
+}

src/add-ons/kernel/file_systems/packagefs/AttributeCookie.h

@@ -15,7 +15,7 @@ class AttributeCookie {
 public:
 	virtual						~AttributeCookie();
 
-	virtual	status_t			Close() = 0;
+	virtual	status_t			Close();
 	virtual	status_t			ReadAttribute(off_t offset, void* buffer,
 									size_t* bufferSize) = 0;
 	virtual	status_t			ReadAttributeStat(struct stat* st) = 0;

src/add-ons/kernel/file_systems/packagefs/AttributeDirectoryCookie.cpp

@@ -10,3 +10,10 @@
 AttributeDirectoryCookie::~AttributeDirectoryCookie()
 {
 }
+
+
+status_t
+AttributeDirectoryCookie::Close()
+{
+	return B_OK;
+}

src/add-ons/kernel/file_systems/packagefs/AttributeDirectoryCookie.h

@@ -15,7 +15,7 @@ class AttributeDirectoryCookie {
 public:
 	virtual						~AttributeDirectoryCookie();
 
-	virtual	status_t			Close() = 0;
+	virtual	status_t			Close();
 	virtual	status_t			Read(dev_t volumeID, ino_t nodeID,
 									struct dirent* buffer, size_t bufferSize,
 									uint32* _count) = 0;

src/add-ons/kernel/file_systems/packagefs/EmptyAttributeDirectoryCookie.cpp

@@ -7,13 +7,6 @@
 #include "EmptyAttributeDirectoryCookie.h"
 
 
-status_t
-EmptyAttributeDirectoryCookie::Close()
-{
-	return B_OK;
-}
-
-
 status_t
 EmptyAttributeDirectoryCookie::Read(dev_t volumeID, ino_t nodeID,
 	struct dirent* buffer, size_t bufferSize, uint32* _count)

src/add-ons/kernel/file_systems/packagefs/EmptyAttributeDirectoryCookie.h

@@ -11,7 +11,6 @@
 
 class EmptyAttributeDirectoryCookie : public AttributeDirectoryCookie {
 public:
-	virtual	status_t			Close();
 	virtual	status_t			Read(dev_t volumeID, ino_t nodeID,
 									struct dirent* buffer, size_t bufferSize,
 									uint32* _count);

src/add-ons/kernel/file_systems/packagefs/UnpackingAttributeCookie.cpp

@@ -100,13 +100,6 @@ UnpackingAttributeCookie::Open(PackageNode* packageNode, const char* name,
 }
 
 
-status_t
-UnpackingAttributeCookie::Close()
-{
-	return B_OK;
-}
-
-
 status_t
 UnpackingAttributeCookie::ReadAttribute(off_t offset, void* buffer,
 	size_t* bufferSize)

src/add-ons/kernel/file_systems/packagefs/UnpackingAttributeCookie.h

@@ -25,7 +25,6 @@ public:
 	static	status_t			Open(PackageNode* packageNode, const char* name,
 									int openMode, AttributeCookie*& _cookie);
 
-	virtual	status_t			Close();
 	virtual	status_t			ReadAttribute(off_t offset, void* buffer,
 									size_t* bufferSize);
 	virtual	status_t			ReadAttributeStat(struct stat* st);

src/add-ons/kernel/file_systems/packagefs/UnpackingAttributeDirectoryCookie.cpp

@@ -45,13 +45,6 @@ UnpackingAttributeDirectoryCookie::Open(PackageNode* packageNode,
 }
 
 
-status_t
-UnpackingAttributeDirectoryCookie::Close()
-{
-	return B_OK;
-}
-
-
 status_t
 UnpackingAttributeDirectoryCookie::Read(dev_t volumeID, ino_t nodeID,
 	struct dirent* buffer, size_t bufferSize, uint32* _count)

src/add-ons/kernel/file_systems/packagefs/UnpackingAttributeDirectoryCookie.h

@@ -24,7 +24,6 @@ public:
 	static	status_t			Open(PackageNode* packageNode,
 									AttributeDirectoryCookie*& _cookie);
 
-	virtual	status_t			Close();
 	virtual	status_t			Read(dev_t volumeID, ino_t nodeID,
 									struct dirent* buffer, size_t bufferSize,
 									uint32* _count);