shared pointer comparisons with other pointers

Former-commit-id: d5ede50b040c82e02eb2b82982091bdd0fb7da12

src/server.h

@@ -210,11 +210,21 @@ public:
         return m_ptr == other.m_ptr;
     }
 
+    bool operator==(const void *p) const
+    {
+        return m_ptr == p;
+    }
+
     bool operator!=(const robj_sharedptr &other) const
     {
         return m_ptr != other.m_ptr;
     }
 
+    bool operator!=(const void *p) const
+    {
+        return m_ptr != p;
+    }
+
     redisObject* operator->() const
     {
         return m_ptr;