Missing spacing in fons__getQuad() ?

When calculating the advance in fons__getQuad(), on line 1244:
```c
*x += (int)(glyph->xadv / 10.0f + 0.5f);
```
Shouldn't the spacing be added somewhere like it is on line 1203:
```c
*x += (int)(adv + spacing + 0.5f);
```
When you set -1 as letter spacing in nanovg, the result looks as if it set to 0.
