No need for an abstaract HIODev::close

...that was only called from dtors anyway, where its virtual-ness doesn't
actually help (and would trigger loplugin:fragiledestructor if that were
enabled)

Change-Id: I477a22f2cadd1124b7106c5338e525629968a284

hwpfilter/source/hiodev.cxx

@@ -116,7 +116,11 @@ HStreamIODev::HStreamIODev(HStream * stream):_stream(stream)
 
 HStreamIODev::~HStreamIODev()
 {
-    close();
+/* 플러시한 후 닫는다. */
+    this->flush();
+    if (_gzfp)
+        gz_close(_gzfp);
+    _gzfp = nullptr;
 }
 
 
@@ -142,16 +146,6 @@ void HStreamIODev::flush()
 }
 
 
-void HStreamIODev::close()
-{
-/* 플러시한 후 닫는다. */
-    this->flush();
-    if (_gzfp)
-        gz_close(_gzfp);
-    _gzfp = nullptr;
-}
-
-
 int HStreamIODev::state() const
 {
     return 0;
@@ -272,7 +266,6 @@ HMemIODev::HMemIODev(char *s, int len)
 
 HMemIODev::~HMemIODev()
 {
-    close();
 }
 
 
@@ -295,11 +288,6 @@ void HMemIODev::flush()
 }
 
 
-void HMemIODev::close()
-{
-}
-
-
 int HMemIODev::state() const
 {
     if (pos <= length)

hwpfilter/source/hiodev.h

@@ -46,7 +46,6 @@ class DLLEXPORT HIODev
         virtual ~HIODev();
 
         virtual bool open() = 0;
-        virtual void close() = 0;
         virtual void flush() = 0;
         virtual int  state() const = 0;
 /* gzip routine wrapper */
@@ -73,7 +72,7 @@ struct gz_stream;
  * This controls the HStream given by constructor
  * @short Stream IO device
  */
-class HStreamIODev : public HIODev
+class HStreamIODev final: public HIODev
 {
     private:
 /* zlib으로 압축을 풀기 위한 자료 구조 */
@@ -86,10 +85,6 @@ class HStreamIODev : public HIODev
  * Check whether the stream is available
  */
         virtual bool open() override;
-/**
- * Free stream object
- */
-        virtual void close() override;
 /**
  * If the stream is gzipped, flush the stream.
  */
@@ -139,7 +134,7 @@ class HStreamIODev : public HIODev
  * The HMemIODev class controls the Input/Output device.
  * @short Memory IO device
  */
-class HMemIODev : public HIODev
+class HMemIODev final: public HIODev
 {
     uchar *ptr;
     int pos, length;
@@ -148,7 +143,6 @@ class HMemIODev : public HIODev
         virtual ~HMemIODev() override;
 
         virtual bool open() override;
-        virtual void close() override;
         virtual void flush() override;
         virtual int  state() const override;
 /* gzip routine wrapper */