From Jannik Heller, typo fixes

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14882 16af8721-9629-0410-8352-f15c8da7e697

src/osgGA/StateSetManipulator.cpp

@@ -41,7 +41,7 @@ void StateSetManipulator::setStateSet(StateSet *stateset)
     // specify that this stateset is dynamic so it prevents
     // the draw and update phase from overlapping - good for
     // stability but breaks all the performance advantage of
-    // DrawThreadPerContex.
+    // DrawThreadPerContext.
     _stateset->setDataVariance(osg::Object::DYNAMIC);
 #endif
 }