fix unnecessary free memory.
fix unnecessary free memory.

snmsts/roswell,roswell/roswell,roswell/roswell,roswell/roswell,snmsts/roswell,snmsts/roswell,guicho271828/roswell,guicho271828/roswell,guicho271828/roswell,guicho271828/roswell,roswell/roswell,snmsts/roswell