[FIX] l10n_generic_coa: bank statement demo data

addons/l10n_generic_coa/data/account_bank_statement_demo.xml

@@ -12,7 +12,7 @@
         </record>
 
         <record id="demo_bank_statement_line_1" model="account.bank.statement.line">
-            <field name="ref">''</field>
+            <field name="ref"></field>
             <field name="statement_id" ref="l10n_generic_coa.demo_bank_statement_1"/>
             <field name="sequence">1</field>
             <field name="name">SAJ/2014/002 and SAJ/2014/003</field>
@@ -25,7 +25,7 @@
         </record>
 
         <record id="demo_bank_statement_line_2" model="account.bank.statement.line">
-            <field name="ref">''</field>
+            <field name="ref"></field>
             <field name="statement_id" ref="l10n_generic_coa.demo_bank_statement_1"/>
             <field name="sequence">2</field>
             <field name="name">Bank fees</field>
@@ -37,7 +37,7 @@
         </record>
 
         <record id="demo_bank_statement_line_3" model="account.bank.statement.line">
-            <field name="ref">''</field>
+            <field name="ref"></field>
             <field name="statement_id" ref="l10n_generic_coa.demo_bank_statement_1"/>
             <field name="sequence">3</field>
             <field name="name">Prepayment</field>
@@ -50,7 +50,7 @@
         </record>
 
         <record id="demo_bank_statement_line_4" model="account.bank.statement.line">
-            <field name="ref">''</field>
+            <field name="ref"></field>
             <field name="statement_id" ref="l10n_generic_coa.demo_bank_statement_1"/>
             <field name="sequence">4</field>
             <field name="name">First 2000 € of SAJ/2014/001</field>
@@ -63,7 +63,7 @@
         </record>
 
         <record id="demo_bank_statement_line_5" model="account.bank.statement.line">
-            <field name="ref">''</field>
+            <field name="ref"></field>
             <field name="statement_id" ref="l10n_generic_coa.demo_bank_statement_1"/>
             <field name="sequence">5</field>
             <field name="name">Last Year Interests</field>
@@ -75,7 +75,7 @@
         </record>
 
         <record id="demo_bank_statement_line_6" model="account.bank.statement.line">
-            <field name="ref">''</field>
+            <field name="ref"></field>
             <field name="statement_id" ref="l10n_generic_coa.demo_bank_statement_1"/>
             <field name="sequence">1</field>
             <field name="name" eval="'SAJ/'+time.strftime('%Y')+'/002'"/>