fix issue 3203 - oss-fuzz reported bug 18747 which was not fixed in by the commit for fixing the issue 3197.
fix issue 3203 - oss-fuzz reported bug 18747 which was not fixed in by the commit for fixing the issue 3197.

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