server : fix params struct

Author: ggerganov

examples/server/server.cpp

@@ -2302,14 +2302,14 @@ struct server_context {
 
                 // TODO: configurable through requests
                 struct common_speculative_params params_spec;
-                params_spec.n_draft   = params.speculative.n_max;
+                params_spec.n_draft   = slot.params.speculative.n_max;
                 params_spec.n_reuse   = 256;
-                params_spec.p_min     = params.speculative.p_min;
+                params_spec.p_min     = slot.params.speculative.p_min;
 
                 llama_tokens draft = common_speculative_gen_draft(slot.spec, params_spec, slot.cache_tokens, id);
 
                 // ignore small drafts
-                if (params.speculative.n_min > (int) draft.size()) {
+                if (slot.params.speculative.n_min > (int) draft.size()) {
                     continue;
                 }