[proposal] save the return line

[mozhata]

Description

gin should do something to save the return line

How to reproduce

when met an error we use to lines to deal with it

	var err error 
	if err != nil{
		c.Status(http.StatusInternalServerError)
		return
	}

It will be cool to use return c.Status(http.StatusInternalServerError) or provide some alike method to support this

[arshabbir]

@easonlin404

Please review

#3140

Added error return for c.Status(code) so that this can be used as return c.Status(code) to avoid/save extra return statement