add steps back to doxygen

This fixes the bug introduced in 17479c593.

diff --git a/doc/doxygen/CMakeLists.txt b/doc/doxygen/CMakeLists.txt
index 41a1cc20102d4fa3ec47b25da8ad2309396c19e3..2b0e75e4d57aaac453bf17634116a56358c761a9 100644 (file)
--- a/doc/doxygen/CMakeLists.txt
+++ b/doc/doxygen/CMakeLists.txt
@@ -125,6 +125,9 @@ FOREACH(_step ${DEAL_II_STEPS})
   LIST(APPEND _doxygen_depend
     ${CMAKE_CURRENT_BINARY_DIR}/tutorial/${_step}.h
     )
+  LIST(APPEND _doxygen_input
+    ${CMAKE_CURRENT_BINARY_DIR}/tutorial/${_step}.h
+    )
 ENDFOREACH()
 
 FILE(APPEND "${CMAKE_CURRENT_BINARY_DIR}/options.dox"