right shift count warning fixes

[Mike McCormack]

Mike McCormack wrote:
> 
> I get 3 warnings, when compiling Wine without any extra -W flags. They 
> are all of the following kind:
> 
> config.c: In function `init_server_dir':
> config.c:125: warning: right shift count >= width of type

This occured because I configured wine as follows:

CFLAGS="-Werror" ./configure

This causes some of the configure tests which produce warnings to fail, 
and thus misconfigure Wine.  Bad idea :)

Mike