use designated initializers for yajl_callbacks struct

src/display_version.c

@@ -42,17 +42,8 @@ static int version_map_key(void *ctx, const unsigned char *stringval, unsigned i
 }
 
 static yajl_callbacks version_callbacks = {
-    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 */
+    .yajl_string = version_string,
+    .yajl_map_key = version_map_key,
 };
 
 /*

src/ipc.c

@@ -815,7 +815,6 @@ 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;
 
@@ -834,8 +833,9 @@ IPC_HANDLER(subscribe) {
     }
 
     /* Setup the JSON parser */
-    memset(&callbacks, 0, sizeof(yajl_callbacks));
-    callbacks.yajl_string = add_subscription;
+    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

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

src/load_layout.c

@@ -402,16 +402,16 @@ void tree_append_json(const char *filename) {
     LOG("read %d bytes\n", n);
     yajl_gen g;
     yajl_handle hand;
-    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;
+    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,
+    };
 #if YAJL_MAJOR >= 2
     g = yajl_gen_alloc(NULL);
     hand = yajl_alloc(&callbacks, NULL, (void*)g);