Fixed FEM for VTK6 or 7

CMakeLists.txt

@@ -1,4 +1,4 @@
-if (LEMMA_VTK_SUPPORT)
+if (LEMMA_VTK6_SUPPORT OR LEMMA_VTK7_SUPPORT)
 	include_directories(${CMAKE_INSTALL_PREFIX}/include)
 
 	include_directories( "${CMAKE_CURRENT_SOURCE_DIR}/include" )