realign a 'HAVE_GTS' check with 'ifdef' style

diff --git a/lib/neatogen/delaunay.c b/lib/neatogen/delaunay.c
index 236738d8d4544e9839bb4b352c56bc03f16223d1..413cb0029e1aac39031269d12514daa28a468aa2 100644 (file)
--- a/lib/neatogen/delaunay.c
+++ b/lib/neatogen/delaunay.c
@@ -20,7 +20,7 @@
 #include <common/memory.h>
 #include <common/logic.h>
 
-#if defined(HAVE_GTS)
+#ifdef HAVE_GTS
 #include <gts.h>
 
 static gboolean triangle_is_hole(GtsTriangle * t)