REQUIRED flag will get rid of need to have extra if check

CMakeLists.txt

@@ -1110,7 +1110,7 @@ if ( BUILD_DOCS )
     # output directory for 'make doc'       is "${OpenMW_BINARY_DIR}/docs/Doxygen"
     # output directory for 'make doc_pages' is "${DOXYGEN_PAGES_OUTPUT_DIR}" if defined
     #                                       or "${OpenMW_BINARY_DIR}/docs/Pages" otherwise
-    if ( DOXYGEN_FOUND )
+
     # determine output directory for doc_pages
     if (NOT DEFINED DOXYGEN_PAGES_OUTPUT_DIR)
         set(DOXYGEN_PAGES_OUTPUT_DIR "${OpenMW_BINARY_DIR}/docs/Pages")
@@ -1127,7 +1127,6 @@ if ( BUILD_DOCS )
         WORKING_DIRECTORY ${OpenMW_BINARY_DIR}
         COMMENT "Generating documentation for the github-pages at ${DOXYGEN_PAGES_OUTPUT_DIR}" VERBATIM)
 endif ()
-endif()
 
 # Qt localization
 if (USE_QT)