renderer: guard layer in renderLayer

ref #7181

src/render/Renderer.cpp

@@ -716,6 +716,9 @@ void CHyprRenderer::renderWindow(PHLWINDOW pWindow, CMonitor* pMonitor, timespec
 }
 
 void CHyprRenderer::renderLayer(PHLLS pLayer, CMonitor* pMonitor, timespec* time, bool popups) {
+    if (!pLayer)
+        return;
+
     static auto PDIMAROUND = CConfigValue<Hyprlang::FLOAT>("decoration:dim_around");
 
     if (*PDIMAROUND && pLayer->dimAround && !m_bRenderingSnapshot && !popups) {