talk : make compatible with c++11 (part 2)

examples/talk.wasm/gpt-2.cpp

@@ -533,7 +533,9 @@ bool gpt2_eval(
     params.mem_buffer = buf;
 
     struct ggml_context * ctx0 = ggml_init(params);
-    struct ggml_cgraph gf = { .n_threads = n_threads };
+
+    struct ggml_cgraph gf = { };
+    gf.n_threads = n_threads;
 
     struct ggml_tensor * embd = ggml_new_tensor_1d(ctx0, GGML_TYPE_I32, N);
     memcpy(embd->data, embd_inp.data(), N*ggml_element_size(embd));

examples/talk/gpt-2.cpp

@@ -533,7 +533,9 @@ bool gpt2_eval(
     params.mem_buffer = buf;
 
     struct ggml_context * ctx0 = ggml_init(params);
-    struct ggml_cgraph gf = { .n_threads = n_threads };
+
+    struct ggml_cgraph gf = { };
+    gf.n_threads = n_threads;
 
     struct ggml_tensor * embd = ggml_new_tensor_1d(ctx0, GGML_TYPE_I32, N);
     memcpy(embd->data, embd_inp.data(), N*ggml_element_size(embd));