SUSE-SU-2022:0769-1 Security update for libcaca

This update for libcaca fixes the following issues: - CVE-2021-30498, CVE-2021-30499: If an image has a size of 0x0, when exporting, no data is written and space is allocated for the header only, not taking into account that sprintf appends a NUL byte bsc1184751, bsc1184752...