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.