create a more consistent aqbanking online_id

The online_id will generated based on bankcode and accountnumber. The
accountnumber may have leading zeros which shall be ignored to make the
creation reliable. In my case the accountnumber of the accountinfo has
no
leading zeros, but the accountnumber of the imported transactions has
leading
zeros. In the result the generated online_id was different and the
widget
to assign the transactions to a account appears always.

gnucash/import-export/aqb/gnc-ab-utils.c

@@ -323,6 +323,15 @@ create_online_id(const gchar *bankcode, const gchar *accountnumber)
 {
     gchar *online_id;
 
+    /* The accountnumber may have leading zeros, depending on where them
+     * accountnumber is came from, e.g. the accountnumber of accountinfo
+     * has no leading zeros while the (local)accountnumber of a transaction
+     * has leading zeros.
+     * So remove all leading '0', to get a consistent online_id.
+     */
+    while (accountnumber && *accountnumber == '0')
+        accountnumber++;
+
     online_id = g_strconcat(bankcode ? bankcode : "",
                             accountnumber ? accountnumber : "",
                             (gchar*)NULL);
@@ -342,7 +351,7 @@ join_ab_strings_cb(const gchar *str, gpointer user_data)
 
     if (!str || !*str)
         return NULL;
- 
+
     tmp = g_strdup(str);
     g_strstrip(tmp);
     gnc_utf8_strip_invalid_and_controls(tmp);
@@ -406,7 +415,7 @@ gnc_ab_get_purpose(const AB_TRANSACTION *ab_trans, gboolean is_ofx)
 
     g_return_val_if_fail(ab_trans, g_strdup(""));
 
-    if (!is_ofx && gnc_prefs_get_bool(GNC_PREFS_GROUP_AQBANKING, GNC_PREF_USE_TRANSACTION_TXT)) 
+    if (!is_ofx && gnc_prefs_get_bool(GNC_PREFS_GROUP_AQBANKING, GNC_PREF_USE_TRANSACTION_TXT))
     {
         /* According to AqBanking, some of the non-swift lines have a special
          * meaning. Some banks place valuable text into the transaction text,