Fix typo

Change-Id: Ie9174d46b3936ee19a7d1e70f85af6fed2c0c6d4
Reviewed-on: https://gerrit.libreoffice.org/73637Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Julien Nabet <serval2412@yahoo.fr>

forms/source/xforms/binding.hxx

@@ -65,7 +65,7 @@ namespace xforms
 /** An XForms Binding. Contains:
  *  # a connection to its model
  *  # an ID
- *  # an binding expression
+ *  # a binding expression
  *  # model item properties
  *  # (NOT YET IMPLEMENTED) child bindings (sequence of)
  *