[BUILD] fix build with gcc 4.3

[BUILD] fix build with gcc 4.3

For Fedora 9 gcc 4.3 will be shipping as a feature, and right now haproxy does
not compile with gcc 4.3.

It appears that there is a reordering of headers or something along those lines,
This is the patch that gets haproxy to compile with gcc 4.3.  I'm not sure if
this is the correct approach you would want to use, so please correct me.

If this works for you, I'll go ahead and put this patch in the src rpm until a
release of haproxy which compiles with gcc 4.3 is released.