fix bug for utest of message array, it does not free messages now.

@@ -541,18 +541,18 @@ VOID TEST(ProtocolMsgArrayTest, MessageArray)
         arr.msgs[2] = msg.copy();
         EXPECT_EQ(3, msg.count());
     }
-    EXPECT_EQ(0, msg.count());
+    EXPECT_EQ(3, msg.count());
     
     if (true) {
         SrsMessageArray arr(3);
         
         arr.msgs[0] = msg.copy();
-        EXPECT_EQ(1, msg.count());
+        EXPECT_EQ(4, msg.count());
         
         arr.msgs[2] = msg.copy();
-        EXPECT_EQ(2, msg.count());
+        EXPECT_EQ(5, msg.count());
     }
-    EXPECT_EQ(0, msg.count());
+    EXPECT_EQ(5, msg.count());
 }
 
 /**