[gnome-commander] Fix memory leak in GnomeCmdPlainPath

[Uwe Scholz <uwescholz src gnome org>]

commit c21a89f8dbb13bae7c16441266c4cf0b1faae165
Author: Eric R. Schulz <eric ers35 com>
Date:   Wed Aug 17 21:17:40 2016 -0400

    Fix memory leak in GnomeCmdPlainPath
    
    Define the base class destructor as virtual so the derived class
    destructor is called when delete is called on an instance of the
    derived class through a base class pointer.

 src/gnome-cmd-path.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gnome-cmd-path.h b/src/gnome-cmd-path.h
index bbb4bc3..c1baa88 100644
--- a/src/gnome-cmd-path.h
+++ b/src/gnome-cmd-path.h
@@ -30,6 +30,7 @@ struct GnomeCmdPath
   public:
 
     GnomeCmdPath *clone() const                                 {  return do_clone();  }
+    virtual ~GnomeCmdPath() { }
 
     virtual const gchar *get_path() = 0;
     virtual const gchar *get_display_path() = 0;