From 360134a8d4d2b488522ef5ca01329a658aa520ff Mon Sep 17 00:00:00 2001
From: prokrypt <prokrypt@edited.us>
Date: Sat, 29 Jun 2024 13:56:16 -0700
Subject: [PATCH] spectrum: don't check blacklistFreqs if unset

Fixes part of https://github.com/armel/uv-k5-firmware-custom/issues/151
---
 app/spectrum.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/app/spectrum.c b/app/spectrum.c
index c5383cc..fd46e8e 100644
--- a/app/spectrum.c
+++ b/app/spectrum.c
@@ -671,9 +671,10 @@ static void Blacklist() {
 #ifdef ENABLE_SCAN_RANGES
 static bool IsBlacklisted(uint16_t idx)
 {
-  for(uint8_t i = 0; i < ARRAY_SIZE(blacklistFreqs); i++)
-    if(blacklistFreqs[i] == idx)
-      return true;
+  if(blacklistedFreqs[0]) // cheaper than checking blacklistFreqsIdx
+    for(uint8_t i = 0; i < ARRAY_SIZE(blacklistFreqs); i++)
+      if(blacklistFreqs[i] == idx)
+        return true;
   return false;
 }
 #endif