fix rotate extrude (openscad#5384)

Author: pca006132

src/geometry/GeometryEvaluator.cc

@@ -856,7 +856,7 @@ static std::unique_ptr<Geometry> rotatePolygon(const RotateExtrudeNode& node, co
     }
   }
 
-  if ((max_x - min_x) > max_x && (max_x - min_x) > fabs(min_x)) {
+  if (max_x > 0 && min_x < 0) {
     LOG(message_group::Error, "all points for rotate_extrude() must have the same X coordinate sign (range is %1$.2f -> %2$.2f)", min_x, max_x);
     return nullptr;
   }