Wrong X on Heltec 128x64 SPI

```
Basically, X=127 on u8glib is x=1 on the display

Configuration:
U8GLIB_SH1106_128X64 u8g(4, 5, 6, 7);
Display: 
http://www.ebay.it/itm/291216700788?euid=9127c35a7e5b4982aafeb93218f229b2&cp=1

Thanks
```

Original issue reported on code.google.com by `raffaele...@gmail.com` on 7 Jul 2015 at 2:07
