fix broken nl.po

| nl.po:10221: duplicate message definition...
| nl.po:10203: ...this is the location of the first definition
| nl.po:10224: duplicate message definition...
| nl.po:10206: ...this is the location of the first definition
| nl.po:10362: duplicate message definition...
| nl.po:6654: ...this is the location of the first definition
| nl.po:10372: duplicate message definition...
| nl.po:10370: ...this is the location of the first definition
| nl.po:10382: duplicate message definition...
| nl.po:6498: ...this is the location of the first definition