A minor optimization of the code. (#733)

Author: AsakusaRinne

LLama/LLamaExecutorBase.cs

@@ -195,14 +195,13 @@ protected virtual void HandleRunOutOfContext(int tokensToKeep)
             // if we run out of context:
             // - take the tokensToKeep first tokens from the original prompt (via n_past)
             // - take half of the last (n_ctx - tokensToKeep) tokens and recompute the logits in batches
-            var n_left = _pastTokensCount - tokensToKeep;
-            var n_discard = n_left / 2;
+            int n_left = _pastTokensCount - tokensToKeep;
+            int n_discard = n_left / 2;
 
-            NativeApi.llama_kv_cache_seq_rm(Context.NativeHandle, (LLamaSeqId)0, tokensToKeep, tokensToKeep + n_discard);
-            NativeApi.llama_kv_cache_seq_add(Context.NativeHandle, (LLamaSeqId)0, tokensToKeep + n_discard, _pastTokensCount, -n_discard);
+            NativeApi.llama_kv_cache_seq_rm(Context.NativeHandle, LLamaSeqId.Zero, tokensToKeep, tokensToKeep + n_discard);
+            NativeApi.llama_kv_cache_seq_add(Context.NativeHandle, LLamaSeqId.Zero, tokensToKeep + n_discard, _pastTokensCount, -n_discard);
 
             _pastTokensCount -= n_discard;
-            
             // stop saving session if we run out of context
             _pathSession = string.Empty;
         }