[Libjpeg-devel-6x] save the compressed data to memory.

[杨辉强 <hui...@yu...>]

Hi, all:
     I am newbie to libjpeg. In the example code the compressed data can 
be save to a file.
Now I want save  the compressed data to memory such as a unsigned 
array.  I have read the
FAQ but can't find any hints. Could you give me some instructions.

Thank you!
Best wishes!