get_shared_ptr renamed to weak_ptr::lock.

[SVN r17307]

sp_techniques.html

@@ -413,7 +413,7 @@ public:
 
     virtual shared_ptr<X> getX()
     {
-        shared_ptr<X> px = get_shared_ptr(weak_this);
+        shared_ptr<X> px = weak_this.lock();
         return px;
     }
 };