use C99 bools in _greater_than

diff --git a/lib/ortho/trap.h b/lib/ortho/trap.h
index f62d4bf1f630a104506856d818c14f4eaa82c302..273e6bff964bbab37f7bb2c7011e0aaa0bdefb21 100644 (file)
--- a/lib/ortho/trap.h
+++ b/lib/ortho/trap.h
@@ -49,6 +49,6 @@ typedef struct {
   (FP_EQUAL((v0)->y, (v1)->y) && FP_EQUAL((v0)->x, (v1)->x))
 
 #define _greater_than(v0, v1) \
-  (((v0)->y > (v1)->y + C_EPS) ? TRUE : (((v0)->y < (v1)->y - C_EPS) ? FALSE : ((v0)->x > (v1)->x)))
+  (((v0)->y > (v1)->y + C_EPS) ? true : (((v0)->y < (v1)->y - C_EPS) ? false : ((v0)->x > (v1)->x)))
 
 extern int construct_trapezoids(int, segment_t*, int*, int, trap_t*);