Fix compiles of a variety of feature combinations

This fixes compilation errors and warnings when compiling a mixture of
non-default feature targets.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/cache/mod.rs b/src/cache/mod.rs
index 9029548..5d7d153 100644
--- a/src/cache/mod.rs
+++ b/src/cache/mod.rs
@@ -600,6 +600,7 @@ impl Cache {
         self.categories.get(&channel_id.into()).cloned()
     }
 
+    #[cfg(feature = "client")]
     pub(crate) fn update<E: CacheUpdate>(&mut self, e: &mut E) -> Option<E::Output> {
         e.update(self)
     }