A console screen buffer sync problem in kernel32/editline.c

[FENG Yu Ning]

I have found a synchronization problem in kernel32/editline.c . The
problem appears when read and write operations to the console are in
different threads.

Detail information is here:

    http://bugs.winehq.org/show_bug.cgi?id=13188

Solution to it should not be difficult. Could any developers look into
this and fix it? Thanks very much!