Unbreak the build on win32.

Cleanup some warning.

Remark: when struct/class are declared differently than they are defined, this make problem for VC++ since it seems to mangle class differently that struct. These error are very hard to understand and find. So please, try to keep your definition/declaration in sync.

Only tested with VS2008. hope it does not break anything. feel free to revert.

llvm-svn: 64554

llvm/lib/Support/APFloat.cpp

@@ -1239,7 +1239,7 @@ APFloat::addOrSubtractSpecials(const APFloat &rhs, bool subtract)
   case convolve(fcInfinity, fcInfinity):
     /* Differently signed infinities can only be validly
        subtracted.  */
-    if((sign ^ rhs.sign) != subtract) {
+    if(((sign ^ rhs.sign)!=0) != subtract) {
       makeNaN();
       return opInvalidOp;
     }