Error message Strict warning: Declaration of views_handler_sort_group_by_numeric::ui_name() should be compatible with that of v

Patch needs -p1 to apply. In any case, the fix is correct.

This should should be commited to 6.x, too

[merlin@furor views]$ grep -R 'function ui_name()' modules/ handlers/ plugins/
handlers/views_handler_filter_group_by_numeric.inc:  function ui_name() {
handlers/views_handler_field_group_by_numeric.inc:  function ui_name() {
handlers/views_handler_argument_group_by_numeric.inc:  function ui_name() {
handlers/views_handler_sort_group_by_numeric.inc:  function ui_name() {

This doesn't seem to catch every case. Can we get them all at once?

It's looking great and had already RTBC. So commited to both branches.