Update CMakeLists.txt

examples/CMakeLists.txt

@@ -42,7 +42,7 @@ if (ALBERTA_FOUND)
   add_dependencies(examples cahn_hilliard.2d)
 endif ()
 
-if (dune-foamgrid_FOUND)
+if (dune-foamgrid_FOUND AND ALBERTA_FOUND)
   add_amdis_executable(NAME surface.2d SOURCES surface.cc DIM 2 DOW 3 ALBERTA_GRID)
   add_dependencies(examples surface.2d)
 endif ()