Janitor: warning: "__USE_ISOC99" redefined

diff --git a/lib/ortho/trapezoid.c b/lib/ortho/trapezoid.c
index a997b33ea08b3fbc809c1ac249235da7836199fa..cfd3894c15fb6da3541c0f6407c69a683f917d01 100644 (file)
--- a/lib/ortho/trapezoid.c
+++ b/lib/ortho/trapezoid.c
@@ -19,7 +19,9 @@
 #include <string.h>
 #include <assert.h>
 #include <stdio.h>
+#ifndef __USE_ISOC99
 #define __USE_ISOC99
+#endif
 #include <math.h>
 #include <geom.h>
 #include <logic.h>