Fix edit external user or not

htdocs/core/lib/functions.lib.php

@@ -238,6 +238,17 @@ function dol_shutdown()
 }
 
 
+/**
+ * Return true if we are in a context of submitting a parameter
+ *
+ * @param 	string	$paramname		Name or parameter to test
+ * @return 	boolean					True if we have just submit a POST or GET request with the parameter provided (even if param is empty)
+ */
+function GETPOSTISSET($paramname)
+{
+	return (isset($_POST[$paramname]) || isset($_GET[$paramname]));
+}
+
 /**
  *  Return value of a param into GET or POST supervariable.
  *  Use the property $user->default_values[path]['creatform'] and/or $user->default_values[path]['filters'] and/or $user->default_values[path]['sortorder']