FcConfigReference - Increment config reference count
#include <fontconfig/fontconfig.h>
FcConfig * FcConfigReference (FcConfig *config);
Add another reference to config. Configs are freed only when the
  reference count reaches zero. If config is NULL, the current
  configuration is used. In that case this function will be similar to
  FcConfigGetCurrent() except that it increments the reference count before
  returning and the user is responsible for destroying the configuration when
  not needed anymore.