overlays/tabs: Fix crash when scrolling through tabs quickly

rpcs3/Emu/RSX/Overlays/overlay_tabs.cpp

@@ -82,6 +82,8 @@ namespace rsx::overlays
 
 	void tabbed_container::reflow_layout()
 	{
+		std::lock_guard lock(m_mutex);
+
 		if (m_headers_width > w)
 		{
 			// Invalid config
@@ -140,6 +142,8 @@ namespace rsx::overlays
 
 	compiled_resource& tabbed_container::get_compiled()
 	{
+		std::lock_guard lock(m_mutex);
+
 		// NOTE: Caching is difficult as the subviews are themselves dynamic.
 		// Doable but not worth the effort
 		compiled_resources.clear();

rpcs3/Emu/RSX/Overlays/overlay_tabs.h

@@ -49,6 +49,8 @@ namespace rsx::overlays
 		u16 m_headers_width = 0;
 		u32 m_selected_idx = umax;
 		bool m_is_in_tab_selection_mode = true;
+
+		std::mutex m_mutex;
 	};
 }