Fix overflow when doing SDL_sscanf("%hd", ...) An overflow occured in the stdlib_sscanf test, when using msys2 clang32 toolchain. (cherry picked from commit 342ec5113171214154cb197bb3e0e3a0056ea2ad) (cherry picked from commit 10135b2d7bbed6ea0cba24410ebc12887d92968d)