[General] Fix build for client and construction set

CMakeLists.txt

@@ -209,6 +209,7 @@ endif()
 IF(BUILD_OPENMW OR BUILD_OPENCS)
 
     find_package(OpenSceneGraph 3.3.4 REQUIRED osgDB osgViewer osgText osgGA osgParticle osgUtil osgFX)
+    include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS})
 
     set(USED_OSG_PLUGINS
                     osgdb_bmp
@@ -250,7 +251,7 @@ IF(BUILD_OPENMW OR BUILD_OPENCS)
     find_package(OpenAL REQUIRED)
     find_package(Bullet ${REQUIRED_BULLET_VERSION} REQUIRED COMPONENTS BulletCollision LinearMath)
 ELSE()
-    include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS}) # HACK: DO NOT MOVE IT. Used for server only build
+    include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS}) # HACK: DO NOT MOVE THIS. Used for server only build, kept here to avoid merge conflicts above.
 ENDIF(BUILD_OPENMW OR BUILD_OPENCS)