fixes account balance calculation in some case

- we only want to sum transaction in the period when there is a from date.
- when from date is passed, really get period start date from from date

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/ERP5Accounting_getParams.xml

@@ -109,11 +109,14 @@ if section_category:\n
   # calculate the period_start_date for this section\n
   # note that reports that precalculate a section_uid but no section_category\n
   # will have to calculate period_start_date themselves.\n
-  if from_date or at_date:\n
-    params[\'period_start_date\'] = \\\n
+  period_start_date = selection_params.get(\'period_start_date\')\n
+  if not period_start_date and (from_date or at_date):\n
+    period_start_date = \\\n
           context.Base_getAccountingPeriodStartDateForSectionCategory(\n
               section_category=section_category, date=from_date or at_date)\n
-\n
+  if period_start_date:\n
+    params[\'period_start_date\'] = period_start_date\n
+    \n
 # if we have a section uid, it haves priority\n
 section_uid = selection_params.get(\'section_uid\', None)\n
 if section_uid:\n

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/Node_statAccountingBalance.xml

@@ -137,7 +137,7 @@ if period_start_date and params.get(\'node_uid\'):\n
     # if we are in the regular user interface, we only limit\n
     if \'from_date\' in kw:\n
       params[\'from_date\'] = min(kw[\'from_date\'], period_start_date)\n
-  else:\n
+  elif kw.get(\'from_date\'):\n
     # for other account, we calculate the initial balance as the "absolute"\n
     # balance at the beginning of the period, plus debit or credit from this\n
     # beginning of period to the from_date\n

bt5/erp5_accounting/bt/revision

-1562
+1563
\ No newline at end of file