lnurlp: actually fix what the previous commit did not.

lnbits/extensions/lnurlp/lnurl.py

@@ -39,11 +39,14 @@ async def api_lnurl_callback(link_id):
         return jsonify({"status": "ERROR", "reason": "LNURL-pay not found."}), HTTPStatus.OK
 
     min, max = link.min, link.max
-    rate = await get_fiat_rate(link.currency) if link.currency else 1000
+    rate = await get_fiat_rate(link.currency) if link.currency else 1
     if link.currency:
         # allow some fluctuation (as the fiat price may have changed between the calls)
         min = rate * 995 * link.min
         max = rate * 1010 * link.max
+    else:
+        min = link.min * 1000
+        max = link.max * 1000
 
     amount_received = int(request.args.get("amount"))
     if amount_received < min: