Fix GarbageCollect policy for corner cases (#1696)

* Fix GarbageCollect policy for corner cases

* oops

commons/zenoh-shm/src/api/provider/shm_provider.rs

@@ -320,7 +320,7 @@ where
         provider: &ShmProvider<IDSource, Backend>,
     ) -> ChunkAllocResult {
         let result = InnerPolicy::alloc(layout, provider);
-        if let Err(ZAllocError::OutOfMemory) = result {
+        if result.is_err() {
             // try to alloc again only if GC managed to reclaim big enough chunk
             if provider.garbage_collect() >= layout.size().get() {
                 return AltPolicy::alloc(layout, provider);