Added desctructor with jas_cleanup().

src/osgPlugins/jp2/ReaderWriterJP2.cpp

@@ -176,7 +176,7 @@ class ReaderWriterJP2 : public osgDB::ReaderWriter
         {
             supportsExtension("jp2","Jpeg2000 image format");
             supportsExtension("jpc","Jpeg2000 image format");
-        
+
             // little dance here to get around warnings created by jas_image_strtofmt use of char* rather than const char*
             // as a parameted and modern compilers deprecating "jp2" string being treated as char*.
             jas_init();//jas_image_strtofmt() bound to return -1 if jas_init has not been called.
@@ -186,8 +186,13 @@ class ReaderWriterJP2 : public osgDB::ReaderWriter
             jas_image_clearfmts();
         }
 
+        ~ReaderWriterJP2()
+        {
+            jas_cleanup();
+        }
+
         virtual const char* className() const { return "RGB Image Reader/Writer"; }
-        
+
         virtual ReadResult readObject(const std::string& file, const osgDB::ReaderWriter::Options* options) const
         {
             return readImage(file,options);