Fix oss-fuzz reported issue 20491.
Fix oss-fuzz reported issue 20491.

cisco/openh264,cisco/openh264,GuangweiWang/openh264,mstorsjo/openh264,mstorsjo/openh264,cisco/openh264,GuangweiWang/openh264,GuangweiWang/openh264,mstorsjo/openh264,GuangweiWang/openh264,GuangweiWang/openh264,mstorsjo/openh264,cisco/openh264,cisco/openh264,mstorsjo/openh264,cisco/openh264,cisco/openh264,GuangweiWang/openh264,GuangweiWang/openh264,mstorsjo/openh264,mstorsjo/openh264