Updated for Windows CI was working but lates MSVC was still problematic

Author: jmacey

src/Obj.cpp

@@ -26,14 +26,14 @@ Copyright (C) 2009 Jon Macey
 
 #if defined(WIN32)
 
-// namespace std
-// {
-// template < typename T >
-// bool signbit(T t)
-// {
-//   return signbit(double(t));
-// }
-// } // namespace std
+namespace std
+{
+// signbit is not defined for int in windows
+bool signbit(int t)
+{
+  return signbit(double(t));
+}
+} // namespace std
 
 #endif