A few minor fixes to get things to build on Cygwin.

README:
    Clarify cygwin EIO error explanation.
build/SConstruct:
    Cygwin header files cause uninitialized var warnings.
dev/ide_ctrl.cc:
    Get rid of unnecessary byte-swap calls, some of which were
    too ambiguous for cygwin (or gcc 3.4.4).
dev/pcidev.cc:
    Disambiguate arg for overloaded byte swap operation
    (and fix it to be the correct one).

--HG--
extra : convert_revision : be37c6315aacbec6332b1d09e726b39b4aa18dce

README

@@ -65,9 +65,10 @@ To build and test the syscall-emulation simulator:
 2. In $top/m5-test, run "./do-tests.pl -B ALPHA_SE".
 
 The tests should end with "finished do-tests successfully!"
-Note: if you're running under Cygwin several tests will fail with an
-"EIO icount mismatch".  This is due to the lack of fesetround() under
-Cygwin causing differences in floating-point rounding.
+Note: if you're running under Cygwin, several tests will fail with an
+"EIO trace inconsistency: ICNT mismatch" error.  This is due to the
+lack of fesetround() under Cygwin causing differences in floating-point
+rounding.  Other than that discrepancy your simulator is working perfectly.
 
 To build and test the full-system simualator: