forked from amazingfate/loongoffice
(cf. <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425> "(void) cast doesn't suppress __attribute__((warn_unused_result))"). Interestingly, this only occurs with GCC 7, look like <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70365> "warn_unused_result doesn't warn when the result is a class with a destructor" is fixed now. Change-Id: I7b4a066d0bf59080e47404d718917b5f38a98832