run: use installed default fonts

run.sh

@@ -1,6 +1,25 @@
 #!/bin/sh
 
 cd "$(dirname "$0")"
+
+if test "$#" -eq 0; then
+	set --
+	for font in \
+		/usr/share/fonts/TTF/DejaVuSans.ttf \
+		/usr/share/fonts/TTF/Jigmo.ttf \
+		/usr/share/fonts/TTF/Jigmo2.ttf \
+		/usr/share/fonts/noto/NotoSansCJK-Regular.ttc
+	do
+		if test -f "$font"; then
+			set -- "$@" "$font"
+		fi
+	done
+	if test "$#" -eq 0; then
+		echo "run.sh: no default font found; pass a font file" >&2
+		exit 1
+	fi
+fi
+
 pkill strans
 sleep 1
 ./strans map "$@" &