po: correctly advertise whether new PO files have arrived

And don't bother running configure and make upstairs; here is enough.

po/update_linguas.sh

 #!/bin/sh
+
+# Execute this is the po/ subdir.
 cd "$(dirname "$0")" || exit
-echo "Updating translations via TP" && \
+
+echo "Updating translations via TP"
 rsync -Lrtvz  translationproject.org::tp/latest/nano/ .
-git add -v *.po
-echo "Updating LINGUAS for all translations"
-FILE=LINGUAS
-echo "# List of available languages." >"${FILE}"
-echo $(printf '%s\n' *.po | LC_ALL=C sort | sed 's/\.po//g') >>"${FILE}"
-git add -v "${FILE}"
-NEWSTUFF=$(git status --porcelain *.po)
+
+# Are there now PO files that are not in git yet?
+NEWSTUFF=$(git status --porcelain *.po | grep "^??")
+
 if [ -n "${NEWSTUFF}" ]; then
-    printf "New langs found, re-running configure and make at top level (silently)..."
-    (cd .. && ./configure  && make) >/dev/null
-    echo "done"
+    echo "New languages found; updating LINGUAS"
+    echo "# List of available languages." >LINGUAS
+    echo $(printf '%s\n' *.po | LC_ALL=C sort | sed 's/\.po//g') >>LINGUAS
 fi
+
+echo "Remerging and recompiling the PO files..."
+make
+
+#echo "Staging the files"
+#git add -v nano.pot
+#git add -v *.po
+#git add -v LINGUAS