Update ok_error button to be in the style of changed ok button.

diff --git a/src/XGUI/pictures/button_ok_error.png b/src/XGUI/pictures/button_ok_error.png
index 5a900e58805925302e27b6fc806fb7b55c76fb7a..51a1564abc2cc5151deeb999936b3be7f13f7a72 100755 (executable)
Binary files a/src/XGUI/pictures/button_ok_error.png and b/src/XGUI/pictures/button_ok_error.png differ