Fixed a warning for virtual destructor.

netwerk/base/src/nsNetModRegEntry.h

@@ -37,7 +37,7 @@ public:
 
     // nsNetModRegEntry
     nsNetModRegEntry(const char *aTopic, nsIEventQueue *aEventQ, nsINetNotify *aNotify, nsCID aCID);
-    ~nsNetModRegEntry();
+    virtual ~nsNetModRegEntry();
 
     char                *mTopic;
     nsIEventQueue       *mEventQ;

netwerk/base/src/nsNetModuleMgr.h

@@ -36,7 +36,7 @@ public:
     
     // nsNetModuleMgr
     nsNetModuleMgr();
-    ~nsNetModuleMgr();
+    virtual ~nsNetModuleMgr();
 
     static NS_METHOD
     Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);