Fix "Fix gLazyConn race"

stack_gvisor_lazy.go

@@ -145,6 +145,8 @@ func (c *gLazyConn) Close() error {
 			c.handshakeErr = net.ErrClosed
 			c.handshakeDone = true
 			return nil
+		} else if c.handshakeErr != nil {
+			return nil
 		}
 		c.handshakeAccess.Unlock()
 	}
@@ -159,6 +161,8 @@ func (c *gLazyConn) CloseRead() error {
 			c.handshakeErr = net.ErrClosed
 			c.handshakeDone = true
 			return nil
+		} else if c.handshakeErr != nil {
+			return nil
 		}
 		c.handshakeAccess.Unlock()
 	}
@@ -173,6 +177,8 @@ func (c *gLazyConn) CloseWrite() error {
 			c.handshakeErr = net.ErrClosed
 			c.handshakeDone = true
 			return nil
+		} else if c.handshakeErr != nil {
+			return nil
 		}
 		c.handshakeAccess.Unlock()
 	}