removed the usage of magic number in the fix of issue 14035.
removed the usage of magic number in the fix of issue 14035.

cisco/openh264,cisco/openh264,ruil2/openh264,mstorsjo/openh264,mstorsjo/openh264,mstorsjo/openh264,ruil2/openh264,GuangweiWang/openh264,cisco/openh264,GuangweiWang/openh264,mstorsjo/openh264,cisco/openh264,GuangweiWang/openh264,GuangweiWang/openh264,mstorsjo/openh264,GuangweiWang/openh264,ruil2/openh264,mstorsjo/openh264,ruil2/openh264,cisco/openh264,GuangweiWang/openh264,GuangweiWang/openh264,ruil2/openh264,mstorsjo/openh264,cisco/openh264,cisco/openh264,ruil2/openh264,ruil2/openh264