Index: rnd_inclib/font/font.c
===================================================================
--- rnd_inclib/font/font.c	(revision 36555)
+++ rnd_inclib/font/font.c	(revision 36556)
@@ -363,7 +363,7 @@
 					break;
 
 					case RND_GLYPH_ARC:
-						font_arc_bbox(&b, a);
+						font_arc_bbox(&b, &a->arc);
 
 						if (compat)
 							unscaled_radius = a->arc.thickness / 2;