From b84391df893ea60395ab5c01d3112e8318048061 Mon Sep 17 00:00:00 2001
From: Wusaweki <maschin@gmx.net>
Date: Sun, 5 Nov 2023 16:19:13 +0100
Subject: [PATCH] fix null pointer access in display.h

---
 src/plugins/Display/Display.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/plugins/Display/Display.h b/src/plugins/Display/Display.h
index c4853bab4..932c1a8fe 100644
--- a/src/plugins/Display/Display.h
+++ b/src/plugins/Display/Display.h
@@ -91,12 +91,14 @@ class Display {
         Inverter<> *iv;
         record_t<> *rec;
         bool allOff = true;
-        for (uint8_t i = 0; i < mSys->getNumInverters(); i++) {
+        uint8_t nInv = mSys->getNumInverters();
+        for (uint8_t i = 0; i < nInv; i++) {
             iv = mSys->getInverterByPos(i);
-            rec = iv->getRecordStruct(RealTimeRunData_Debug);
             if (iv == NULL)
                 continue;
 
+            rec = iv->getRecordStruct(RealTimeRunData_Debug);
+
             if (iv->isProducing())
                 nrprod++;
             else