Further Windows fixes.

src/Collections/List.hpp

@@ -25,7 +25,7 @@ namespace ArbUt {
 
         inline reference At(size_t index) {
 #ifndef NO_ASSERT
-            if (index >= _vector.size() || index < 0) {
+            if (index >= _vector.size()) {
                 std::stringstream ss;
                 ss << "Index " << index << " is out of bounds.";
                 throw ArbUt::Exception(ss.str());