graphviz: Fix breakage of the name of the preprocessor directive.
[ikiwiki] / IkiWiki /
drwxr-xr-x   ..
-rw-r--r-- 20366 CGI.pm
drwxr-xr-x - Plugin
-rw-r--r-- 12927 Render.pm
-rw-r--r-- 3141 Setup.pm
drwxr-xr-x - Setup
-rw-r--r-- 2052 UserInfo.pm
-rw-r--r-- 3196 Wrapper.pm