yelp-build: Don't spit out error about missing stack files

Bare sh doesn't have nullglob, so we have to check the existence of
filenames we got from iterating over a glob.

1 files changed, 3 insertions, 1 deletions

diff --git a/tools/yelp-build.in b/tools/yelp-build.in
index 447eda9..8438a23 100755
--- a/tools/yelp-build.in
+++ b/tools/yelp-build.in
@@ -195,7 +195,9 @@ yelp_cache_in () {
                 yelp_cache_in_site "$page"
             else
                 for sub in "$page"/*.page "$page"/*.stack; do
-                    yelp_cache_in_page "$sub"
+                    if [ -e "$page" ]; then
+                        yelp_cache_in_page "$sub"
+                    fi
                 done
             fi
         else