chbg fix

bin/chbg

@@ -120,7 +120,7 @@ echo "Selected: $randomimage"
 
 if [ -f "$randomimage" ]; then
   set_wallpaper "$randomimage"
-  return
+  exit 0
 fi
 
 tmpfile=$(mktemp)
@@ -131,6 +131,6 @@ elif command -v wget >/dev/null 2>&1; then
   wget -qO "$tmpfile" "$randomimage"
 else
   echo "!) Unable to fetch image without 'curl' or 'wget'." >&2
-  return 2
+  exit 2
 fi
 set_wallpaper "$tmpfile"