print warnings in release script if xml-linting fails

The build was successful, so it doesn't seem to be a problem per-se,
but it is a good idea to correct these errors non-the-less.

diff --git a/prepare-release b/prepare-release
index 477d638..c5e28ed 100755 (executable)
--- a/prepare-release
+++ b/prepare-release
@@ -46,6 +46,11 @@ elif [ "$1" = 'post-build' ]; then
        else
                echo >&2 'REMEMBER: Change to a valid distribution before release'
        fi
+       if ! xmllint --nonet --valid --noout $(find doc/ -maxdepth 1 -name '*.xml'); then
+               echo >&2 'WARNING: original docbook manpages have errors!'
+       elif ! xmllint --nonet --valid --noout $(find doc/ -mindepth 2 -maxdepth 2 -name '*.xml'); then
+               echo >&2 'WARNING: translated docbook manpages have errors, but originals are okay!'
+       fi
 elif [ "$1" = 'library' ]; then
        librarysymbols() {
                echo "Checking $1 in version $2"