[cmake] avoid PAdaptiveLagrangeSpace for polorder = 0

dune/fem-dg/test/poisson/CMakeLists.txt

@@ -25,6 +25,8 @@ add_executable( poissonall "${MAININCLUDE_PATH}/main.cc"
                            "${MAININCLUDE_PATH}/main_2.cc" 
                            "${MAININCLUDE_PATH}/main_3.cc")
 dune_target_link_libraries(poissonall ${DUNE_LIBS})
+set_property(TARGET poissonall APPEND PROPERTY 
+  COMPILE_DEFINITIONS "LAG")
 
 add_executable( poisson "${MAININCLUDE_PATH}/main.cc" "${MAININCLUDE_PATH}/main_pol.cc")
 dune_target_link_libraries(poisson ${DUNE_LIBS})