Fix typo causing crash

src/core/surface/server.c

@@ -687,7 +687,7 @@ grpc_transport_setup_result grpc_server_setup_transport(
     memset(chand->registered_methods, 0, alloc);
     for (rm = s->registered_methods; rm; rm = rm->next) {
       host = rm->host ? grpc_mdstr_from_string(mdctx, rm->host) : NULL;
-      method = grpc_mdstr_from_string(mdctx, rm->host);
+      method = grpc_mdstr_from_string(mdctx, rm->method);
       hash = GRPC_MDSTR_KV_HASH(host ? host->hash : 0, method->hash);
       for (probes = 0; chand->registered_methods[(hash + probes) % slots]
                                .server_registered_method != NULL;