fix: feature flag

Author: HideBa

src/rust/fcb_core/src/packed_rtree/error.rs

@@ -5,6 +5,7 @@ pub enum Error {
     #[error("io error: {0}")]
     Io(#[from] std::io::Error),
 
+    #[cfg(feature = "http")]
     #[error("http error: {0}")]
     Http(#[from] http_range_client::HttpError),