Revert "use designated initializers for yajl_callbacks struct"

This reverts commit 705b43294a.

This commit broke i3bar for some users.

src/display_version.c

@@ -42,8 +42,17 @@ static int version_map_key(void *ctx, const unsigned char *stringval, unsigned i
 }
 
 static yajl_callbacks version_callbacks = {
-    .yajl_string = version_string,
-    .yajl_map_key = version_map_key,
+    NULL, /* null */
+    NULL, /* boolean */
+    NULL, /* integer */
+    NULL, /* double */
+    NULL, /* number */
+    &version_string,
+    NULL, /* start_map */
+    &version_map_key,
+    NULL, /* end_map */
+    NULL, /* start_array */
+    NULL /* end_array */
 };
 
 /*

src/ipc.c

@@ -815,6 +815,7 @@ static int add_subscription(void *extra, const unsigned char *s,
  */
 IPC_HANDLER(subscribe) {
     yajl_handle p;
+    yajl_callbacks callbacks;
     yajl_status stat;
     ipc_client *current, *client = NULL;
 
@@ -833,9 +834,8 @@ IPC_HANDLER(subscribe) {
     }
 
     /* Setup the JSON parser */
-    yajl_callbacks callbacks = {
-        .yajl_string = add_subscription,
-    };
+    memset(&callbacks, 0, sizeof(yajl_callbacks));
+    callbacks.yajl_string = add_subscription;
 
     p = yalloc(&callbacks, (void*)client);
     stat = yajl_parse(p, (const unsigned char*)message, message_size);

src/key_press.c

@@ -51,10 +51,17 @@ static int json_end_map(void *ctx) {
 }
 
 static yajl_callbacks command_error_callbacks = {
-    .yajl_boolean = json_boolean,
-    .yajl_start_map = json_start_map,
-    .yajl_map_key = json_map_key,
-    .yajl_end_map = json_end_map,
+    NULL,
+    &json_boolean,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    &json_start_map,
+    &json_map_key,
+    &json_end_map,
+    NULL,
+    NULL
 };
 
 /*

src/load_layout.c

@@ -406,16 +406,16 @@ void tree_append_json(const char *filename, char **errormsg) {
     LOG("read %d bytes\n", n);
     yajl_gen g;
     yajl_handle hand;
-    yajl_callbacks callbacks = {
-        .yajl_boolean = json_bool,
-        .yajl_integer = json_int,
-        .yajl_double = json_double,
-        .yajl_string = json_string,
-        .yajl_start_map = json_start_map,
-        .yajl_map_key = json_key,
-        .yajl_end_map = json_end_map,
-        .yajl_end_array = json_end_array,
-    };
+    yajl_callbacks callbacks;
+    memset(&callbacks, '\0', sizeof(yajl_callbacks));
+    callbacks.yajl_start_map = json_start_map;
+    callbacks.yajl_end_map = json_end_map;
+    callbacks.yajl_end_array = json_end_array;
+    callbacks.yajl_string = json_string;
+    callbacks.yajl_map_key = json_key;
+    callbacks.yajl_integer = json_int;
+    callbacks.yajl_double = json_double;
+    callbacks.yajl_boolean = json_bool;
 #if YAJL_MAJOR >= 2
     g = yajl_gen_alloc(NULL);
     hand = yajl_alloc(&callbacks, NULL, (void*)g);