api: add argument "length" in function utf8_is_valid()

doc/en/weechat_plugin_api.en.asciidoc

@@ -2151,18 +2151,22 @@ This function is not available in scripting API.
 
 ==== utf8_is_valid
 
+_Updated in 1.4._
+
 Check if a string is UTF-8 valid.
 
 Prototype:
 
 [source,C]
 ----
-int weechat_utf8_is_valid (const char *string, char **error);
+int weechat_utf8_is_valid (const char *string, int length, char **error);
 ----
 
 Arguments:
 
 * 'string': string
+* 'length': max number of UTF-8 chars to check; if ≤ 0, the whole string is
+  checked _(WeeChat ≥ 1.4)_
 * 'error': if not NULL, '*error*' is set with pointer to first non valid UTF-8
   char in string, if any
 
@@ -2175,7 +2179,7 @@ C example:
 [source,C]
 ----
 char *error;
-if (weechat_utf8_is_valid (string, &error))
+if (weechat_utf8_is_valid (string, -1, &error))
 {
     /* ... */
 }

doc/fr/weechat_plugin_api.fr.asciidoc

@@ -2193,18 +2193,22 @@ Cette fonction n'est pas disponible dans l'API script.
 
 ==== utf8_is_valid
 
+_Mis à jour dans la 1.4._
+
 Vérifier si une chaîne est valide UTF-8.
 
 Prototype :
 
 [source,C]
 ----
-int weechat_utf8_is_valid (const char *string, char **error);
+int weechat_utf8_is_valid (const char *string, int length, char **error);
 ----
 
 Paramètres :
 
 * 'string' : chaîne
+* 'length' : nombre maximum de caractères UTF-8 à vérifier ; si ≤ 0, la chaîne
+  complète est vérifiée _(WeeChat ≥ 1.4)_
 * 'error' : si non NULL, '*error' est alimenté avec le pointeur vers le premier
   caractère non valide dans la chaîne, s'il y en a
 
@@ -2217,7 +2221,7 @@ Exemple en C :
 [source,C]
 ----
 char *error;
-if (weechat_utf8_is_valid (string, &error))
+if (weechat_utf8_is_valid (string, -1, &error))
 {
     /* ... */
 }

doc/it/weechat_plugin_api.it.asciidoc

@@ -2226,18 +2226,24 @@ Questa funzione non è disponibile nelle API per lo scripting.
 
 ==== utf8_is_valid
 
+// TRANSLATION MISSING
+_Updated in 1.4._
+
 Verifica che una stringa sia valida in UTF-8.
 
 Prototipo:
 
 [source,C]
 ----
-int weechat_utf8_is_valid (const char *string, char **error);
+int weechat_utf8_is_valid (const char *string, int length, char **error);
 ----
 
 Argomenti:
 
 * 'string': stringa
+// TRANSLATION MISSING
+* 'length': max number of UTF-8 chars to check; if ≤ 0, the whole string is
+  checked _(WeeChat ≥ 1.4)_
 * 'error': se non NULL, '*error*' è impostato con il puntatore al primo
   carattere UTF-8 non valido nella stringa, se esiste
 
@@ -2250,7 +2256,7 @@ Esempio in C:
 [source,C]
 ----
 char *error;
-if (weechat_utf8_is_valid (string, &error))
+if (weechat_utf8_is_valid (string, -1, &error))
 {
     /* ... */
 }

doc/ja/weechat_plugin_api.ja.asciidoc

@@ -2152,18 +2152,23 @@ if (weechat_utf8_has_8bits (string))
 
 ==== utf8_is_valid
 
+_バージョン 1.4 で更新。_
+
 文字列が妥当な UTF-8 表現か確認。
 
 プロトタイプ:
 
 [source,C]
 ----
-int weechat_utf8_is_valid (const char *string, char **error);
+int weechat_utf8_is_valid (const char *string, int length, char **error);
 ----
 
 引数:
 
 * 'string': 文字列
+// TRANSLATION MISSING
+* 'length': max number of UTF-8 chars to check; if ≤ 0, the whole string is
+  checked _(WeeChat ≥ 1.4)_
 * 'error': NULL でない場合は '*error*'
   は文字列に含まれる最初の妥当でない UTF-8 文字へのポインタ
 
@@ -2176,7 +2181,7 @@ C 言語での使用例:
 [source,C]
 ----
 char *error;
-if (weechat_utf8_is_valid (string, &error))
+if (weechat_utf8_is_valid (string, -1, &error))
 {
     /* ... */
 }