iso, zip: fixed memory leak in destructor

NEWS

 ver 0.15.7 (2009/??/??)
 * archive:
   - close archive when stream is closed
+  - iso, zip: fixed memory leak in destructor
 * input:
   - file: don't fall back to parent directory
   - archive: fixed memory leak in error handler

src/archive/iso_plugin.c

@@ -132,7 +132,8 @@ iso_close(struct archive_file *file)
 	}
 	//close archive
 	iso9660_close(context->iso);
-	context->iso = NULL;
+
+	g_free(context);
 }
 
 /* single archive handling */

src/archive/zip_plugin.c

@@ -99,7 +99,8 @@ zip_close(struct archive_file *file)
 	}
 	//close archive
 	zzip_dir_close (context->dir);
-	context->dir = NULL;
+
+	g_free(context);
 }
 
 /* single archive handling */