From 089012596203aedca86663fff708a6e915506409 Mon Sep 17 00:00:00 2001
From: DS <ds.desour@proton.me>
Date: Sat, 22 Feb 2025 16:17:07 +0100
Subject: [PATCH] SDL Irr device: Ignore +-0.0f y mouse wheel events (#15815)

our code often assumes that it's non-zero, e.g.: `event.MouseInput.Wheel < 0 ? -1 : 1`
---
 irr/src/CIrrDeviceSDL.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/irr/src/CIrrDeviceSDL.cpp b/irr/src/CIrrDeviceSDL.cpp
index bcf5415c3..2775858f3 100644
--- a/irr/src/CIrrDeviceSDL.cpp
+++ b/irr/src/CIrrDeviceSDL.cpp
@@ -706,6 +706,10 @@ bool CIrrDeviceSDL::run()
 			irrevent.MouseInput.X = MouseX;
 			irrevent.MouseInput.Y = MouseY;
 
+			// wheel y can be 0 if scrolling sideways
+			if (irrevent.MouseInput.Wheel == 0.0f)
+				break;
+
 			postEventFromUser(irrevent);
 			break;
 		}