Fix a dumb bug for FreeBSD.

diff --git a/simgear/scene/sky/cloud.cxx b/simgear/scene/sky/cloud.cxx
index e62384b90922e98f2cacc87f1c7250a2fa242aad..d4557064c6de7aa5e2b2654cad9ccf9254186e09 100644 (file)
--- a/simgear/scene/sky/cloud.cxx
+++ b/simgear/scene/sky/cloud.cxx
@@ -46,7 +46,7 @@ inline int (isnan)(double r) { return isnan(r); }
 #endif
 
 #if defined (__FreeBSD__)
-inline int isnan(double r) { return !(r < 0 || r > 0); }
+inline int isnan(double r) { return !(r <= 0 || r >= 0); }
 #endif