Add option to disable X axis font's pre-scaling

If used pre-scaling along X null the effect of the font's hinting.

src/renderer.c

@@ -149,7 +149,7 @@ RenFont* ren_load_font(const char *filename, float size) {
   font->size = size;
 
   const float gamma = 1.5;
-  font->renderer = FR_Renderer_New(FR_HINTING | FR_SUBPIXEL, gamma);
+  font->renderer = FR_Renderer_New(FR_HINTING | FR_SUBPIXEL | FR_PRESCALE_X, gamma);
   if (FR_Load_Font(font->renderer, filename)) {
     free(font);
     return NULL;