libsdl2 patches cause regressions in Jessie

[Avital Ostromich <avital.ostromich@canonical.com>]

Hello,

If my understanding is correct, some patches in libsdl2 (2.0.2+dfsg1-6+deb8u1) as applied in Jessie cause issues because they were intended for libsdl1.2, not libsdl2.
The patch for CVE-2019-7637 causes regressions (more info here), the commit here fixes the CVE.
The patch for CVEs CVE-2019-7635, CVE-2019-7638 and CVE-2019-7636 has unreachable code. The commit here fixes CVE-2019-7635 and the commit here fixes CVEs CVE-2019-7638 and CVE-2019-7636.

Thanks,

Avital