- removes warnings compiling swig engine ... [ 10%] Generating swig-engine.cpp .../libgnucash/engine/engine-helpers.h:31: Warning 313: Unrecognized extern type "C++". .../libgnucash/engine/gnc-date.h:83: Warning 313: Unrecognized extern type "C++". .../libgnucash/engine/qofquery.h:90: Warning 302: Identifier 'QofQuery' redefined (ignored), .../libgnucash/engine/gnc-option.hpp:55: Warning 302: previous definition of 'QofQuery'. .../libgnucash/engine/gnc-commodity.h:56: Warning 313: Unrecognized extern type "C++". .../libgnucash/engine/gncBusiness.h:40: Warning 313: Unrecognized extern type "C++". .../libgnucash/engine/gncEntry.h:37: Warning 313: Unrecognized extern type "C++".
- don't need to create/destroy GHashTable for each feature query - plugs leak: g_hash_table_unref (features_used) not always called properly - to check 1 feature, don't need to traverse whole GHashTable