Add function "hashtable_has_key" in WeeChat and plugin API

doc/en/weechat_plugin_api.en.txt

@@ -2980,6 +2980,43 @@ void *value = weechat_hashtable_get (hashtable, "my_key");
 [NOTE]
 This function is not available in scripting API.
 
+weechat_hashtable_has_key
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+_New in version 0.3.4._
+
+Return 1 if hashtable has key, otherwise 0.
+
+Prototype:
+
+[source,C]
+----------------------------------------
+int weechat_hashtable_has_key (struct t_hashtable *hashtable, void *key);
+----------------------------------------
+
+Arguments:
+
+* 'hashtable': hashtable pointer
+* 'key': key pointer
+
+Return value:
+
+* 1 if key is in hashtable, 0 if key is not in hashtable
+
+C example:
+
+[source,C]
+----------------------------------------
+if (weechat_hashtable_has_key (hashtable, "my_key"))
+{
+    /* key is in hashtable */
+    /* ... */
+}
+----------------------------------------
+
+[NOTE]
+This function is not available in scripting API.
+
 weechat_hashtable_map
 ^^^^^^^^^^^^^^^^^^^^^
 

doc/fr/weechat_plugin_api.fr.txt

@@ -3011,6 +3011,43 @@ void *value = weechat_hashtable_get (hashtable, "ma_cle");
 [NOTE]
 Cette fonction n'est pas disponible dans l'API script.
 
+weechat_hashtable_has_key
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+_Nouveau dans la version 0.3.4._
+
+Retourne 1 si la clé est dans la hashtable, sinon 0.
+
+Prototype :
+
+[source,C]
+----------------------------------------
+int weechat_hashtable_has_key (struct t_hashtable *hashtable, void *key);
+----------------------------------------
+
+Paramètres :
+
+* 'hashtable' : pointeur vers la hashtable
+* 'key' : pointeur vers la clé
+
+Valeur en retour :
+
+* 1 si la clé est dans la hashtable, 0 si la clé n'est pas dans la hashtable
+
+Exemple en C :
+
+[source,C]
+----------------------------------------
+if (weechat_hashtable_has_key (hashtable, "ma_cle"))
+{
+    /* la clé est dans la hashtable */
+    /* ... */
+}
+----------------------------------------
+
+[NOTE]
+Cette fonction n'est pas disponible dans l'API script.
+
 weechat_hashtable_map
 ^^^^^^^^^^^^^^^^^^^^^
 

doc/it/weechat_plugin_api.it.txt

@@ -3013,6 +3013,46 @@ void *value = weechat_hashtable_get (hashtable, "my_key");
 [NOTE]
 Questa funzione non è disponibile nelle API per lo scripting.
 
+weechat_hashtable_has_key
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+_Novità nella versione 0.3.4._
+
+// TRANSLATION MISSING
+Return 1 if hashtable has key, otherwise 0.
+
+Prototipo:
+
+[source,C]
+----------------------------------------
+int weechat_hashtable_has_key (struct t_hashtable *hashtable, void *key);
+----------------------------------------
+
+Argomenti:
+
+* 'hashtable': puntatore alla tabella hash
+* 'key': puntatore alla chiave
+
+Valore restituito:
+
+// TRANSLATION MISSING
+* 1 if key is in hashtable, 0 if key is not in hashtable
+
+Esempio in C:
+
+// TRANSLATION MISSING
+[source,C]
+----------------------------------------
+if (weechat_hashtable_has_key (hashtable, "my_key"))
+{
+    /* key is in hashtable */
+    /* ... */
+}
+----------------------------------------
+
+[NOTE]
+This function is not available in scripting API.
+
 weechat_hashtable_map
 ^^^^^^^^^^^^^^^^^^^^^