SetHoveredPieSlice - unset m_ActiveSubPieMenu if set

When a different (or null) pie slice is selected, the current subpiemenu is obviously not relevant. Don't set it.

This fixes a crash if the player goes into a subpiemenu, and, while holding pie menu button, switches actors (hence setting hovered pie slice to null, but leaving m_ActiveSubPieMenu set), then switches back, and tries to open pie menu again, causing a crash in `Update` on line 568.

Author: Architector4

Source/Entities/PieMenu.cpp

@@ -1212,6 +1212,11 @@ bool PieMenu::SetHoveredPieSlice(const PieSlice* pieSliceToSelect, bool moveCurs
 		return false;
 	}
 
+	if (m_ActiveSubPieMenu) {
+		m_ActiveSubPieMenu->SetEnabled(false, false);
+		m_ActiveSubPieMenu = nullptr;
+	}
+
 	m_HoveredPieSlice = pieSliceToSelect;
 	m_SubPieMenuHoverOpenTimer.Reset();
 	m_BGBitmapNeedsRedrawing = true;