IDREF attribute linkend references an unknown ID "ST_IsPlanar"

[strk]

Recent commit (r12646 ?) broke the docs:

make -C doc check
make[1]: Entering directory `/usr/src/postgis/postgis-2.1/doc'
/usr/bin/xmllint --loaddtd --xinclude --valid postgis-out.xml > /dev/null
postgis-out.xml:1387: element link: validity error : IDREF attribute linkend references an unknown ID "ST_IsPlanar"
postgis-out.xml:1912: element link: validity error : IDREF attribute linkend references an unknown ID "ST_IsPlanar"
postgis-out.xml:3502: element link: validity error : IDREF attribute linkend references an unknown ID "ST_IsPlanar"
make[1]: *** [check] Error 4

[robe]

I can't find this in any of the 2.1 xml files and not seeing it in Debbie's doc build output. It was probably caused by that committ and probably fixed in a later committ.