Security update for graphviz

This update for graphviz fixes the following issues:

Security issue fixed:

- CVE-2019-11023: Fixed a denial of service vulnerability, which was caused by a NULL pointer dereference in agroot() (bsc#1132091).

This update was imported from the SUSE:SLE-15:Update update project.

Fixed bugs
bnc#1132091
VUL-1: CVE-2019-11023: graphviz: The agroot() function in cgraph\obj.c in libcgraph.a has a NULL pointer dereference
Selected Binaries
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