fix: GLM-DSA crash in llama-tokenize when using vocab_only (#22102)

* llama: fix crash in print_info for GLM-DSA when vocab_only is set

* addressed code review comments

* cont : simplify

---------

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

src/llama-model.cpp

@@ -8180,11 +8180,10 @@ void llama_model::print_info() const {
             LLAMA_LOG_INFO("%s: n_cls_out             = %u\n", __func__, hparams.n_cls_out);
 
             size_t i = 0;
-            for (auto label : classifier_labels) {
+            for (const auto & label : classifier_labels) {
                 LLAMA_LOG_INFO("%s: cls_label[%2zu]         = %s\n", __func__, i++, label.c_str());
             }
         }
-    }
 
         if (arch == LLM_ARCH_MAMBA ||
                 arch == LLM_ARCH_MAMBA2 ||
@@ -8289,6 +8288,7 @@ void llama_model::print_info() const {
             LLAMA_LOG_INFO("%s: n_group_experts       = %d\n",     __func__, hparams.n_group_experts);
             LLAMA_LOG_INFO("%s: expert_group_scale    = %.2f\n",   __func__, hparams.expert_group_scale);
         }
+    }
 
     vocab.print_info();
 }