[Clp] Disabled compiler warnings in CoinPragma.hpp

[Sebastian Niemann]

Hi,

the #pragma statements placed in CoinPragma.hpp may also affect client 
code as this header is included in numerous other coin and clp headers 
which are then possibly included by clients. This may lead to disabled 
warnings in a large part of the client code.
We use Clp 1.7.4 which also builds with all the #pragma statements 
commented out (vc90, MSVC2008). Probably this header is not needed 
anymore (or the statements may be moved to some cpp-files to avoid 
disabling the warnings in client code)?

Thanks,
Sebastian