Set Doxygen WARN_AS_ERROR on to facilitate catching issues

Author: louis-langholtz

Documentation/CMakeLists.txt

@@ -25,6 +25,7 @@ set(DOXYGEN_SORT_BRIEF_DOCS YES)
 set(DOXYGEN_SORT_MEMBERS_CTORS_1ST YES)
 set(DOXYGEN_FILE_PATTERNS "*.cpp;*.hpp")
 set(DOXYGEN_ENABLE_PREPROCESSING YES)
+set(DOXYGEN_WARN_AS_ERROR YES)
 
 if(PLAYRHO_ENABLE_BOOST_UNITS)
     set(DOXYGEN_PREDEFINED "PLAYRHO_USE_BOOST_UNITS")