Don't use -Wpointer-arith if it produces excessive warnings

[Mike McCormack]

Wine works around other problems on the build platform (eg. 
strength-reduce bug, detected a few lines after my patch in 
configure.ac).  I don't see how broken headers are any different from a 
broken compiler or broken libraries, which we already detect and deal 
with in the configure script.

Mike

Dmitry Timoshkov wrote:

> I.e. are you proposing to build a potentially broken Wine binaries instead
> of fixing a probable source of bug? Is there a point in turning warnings
> on if nobody pays attention to them or even tries to get rid of them if
> they annoy enough?