GS: Fix crash when resizing window

pcsx2/GS/Renderers/Common/GSDevice.cpp

@@ -196,22 +196,31 @@ bool GSDevice::GetHostRefreshRate(float* refresh_rate)
 
 bool GSDevice::UpdateImGuiFontTexture()
 {
+	ImGuiIO& io = ImGui::GetIO();
+
 	unsigned char* pixels;
 	int width, height;
-	ImGui::GetIO().Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+	io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
 
 	const GSVector4i r(0, 0, width, height);
 	const int pitch = sizeof(u32) * width;
 
-	if (m_imgui_font && m_imgui_font->GetWidth() == width && m_imgui_font->GetHeight() == height)
-		return m_imgui_font->Update(r, pixels, pitch);
+	if (m_imgui_font && m_imgui_font->GetWidth() == width && m_imgui_font->GetHeight() == height &&
+		m_imgui_font->Update(r, pixels, pitch))
+	{
+		io.Fonts->SetTexID(m_imgui_font->GetNativeHandle());
+		return true;
+	}
 
 	GSTexture* new_font = CreateTexture(width, height, 1, GSTexture::Format::Color);
 	if (!new_font || !new_font->Update(r, pixels, pitch))
+	{
+		io.Fonts->SetTexID(m_imgui_font ? m_imgui_font->GetNativeHandle() : nullptr);
 		return false;
+	}
 
-	if (m_imgui_font)
-		Recycle(m_imgui_font);
+	// Don't bother recycling, it's unlikely we're going to reuse the same size as imgui for rendering.
+	delete m_imgui_font;
 
 	m_imgui_font = new_font;
 	ImGui::GetIO().Fonts->SetTexID(new_font->GetNativeHandle());