2019-12-10 version 3.2.1

• Fix snprintf return value checking (#821)
• Remove some warnings (#819)
• Fix fbuffer result checking (#812)
• Fix temporary object handling (#807)
• Improve cmake support (#804)
• Fix invalid int main parameter (#800)
• Improve supporting platform (#797, #817)
• Fix ZLIB error handling (#795)
• Remove unused variable (#793)
• Improve integer overflow checking (#792)