[font] Minor doc fix

src/hb-font.cc

@@ -1402,7 +1402,7 @@ hb_font_get_glyph_shape (hb_font_t *font,
  * hb_font_paint_glyph:
  * @font: #hb_font_t to work upon
  * @glyph: The glyph ID
- * @funcs: #hb_paint_funcs_t to paint with
+ * @pfuncs: #hb_paint_funcs_t to paint with
  * @paint_data: User data to pass to paint callbacks
  *
  * Paints the glyph.
@@ -1419,10 +1419,10 @@ hb_font_get_glyph_shape (hb_font_t *font,
 void
 hb_font_paint_glyph (hb_font_t *font,
                      hb_codepoint_t glyph,
-                     hb_paint_funcs_t *funcs, void *paint_data)
+                     hb_paint_funcs_t *pfuncs, void *paint_data)
 {
   // TODO add an adapter for child fonts like get_glyph_shape does
-  font->get_glyph_paint (glyph, funcs, paint_data);
+  font->get_glyph_paint (glyph, pfuncs, paint_data);
 }
 
 /* A bit higher-level, and with fallback */