Modified Files:

	SGQuat.hxx: Make const method const

diff --git a/simgear/math/SGQuat.hxx b/simgear/math/SGQuat.hxx
index b65de8dc6dc790acef8c9d2c86841f15580e795d..2c3a0a7dfe6aaa59f4a55b6f593b5e80e48536c5 100644 (file)
--- a/simgear/math/SGQuat.hxx
+++ b/simgear/math/SGQuat.hxx
@@ -451,7 +451,7 @@ public:
 
   /// Return the time derivative of the quaternion given the angular velocity
   SGQuat
-  derivative(const SGVec3<T>& angVel)
+  derivative(const SGVec3<T>& angVel) const
   {
     SGQuat deriv;