Index: thermal.c
===================================================================
--- thermal.c	(revision 32260)
+++ thermal.c	(revision 32261)
@@ -186,7 +186,7 @@
 	rnd_coord_t th, lclr;
 
 	if ((line->Point1.X == line->Point2.X) && (line->Point1.Y == line->Point2.Y)) {
-		/* conrer case zero-long line is a circle: do the same as for vias */
+		/* corner case zero-long line is a circle: do the same as for vias */
 TODO("thermal TODO")
 		abort();
 	}