[Bug target/57357] Error with '-mno-sse' and include wchar.h

[thutt at vmware dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57357

--- Comment #2 from thutt at vmware dot com ---
Can you please explain why it's invalid to return a double if SSE is disabled?
SSE is an x86-specific hardware implementation and has nothing to do with
language validity from my standpoint.