Fix #9174: Don't update text effect if it has been reset. (#9183)

(cherry picked from commit 0bc6f32346)

src/texteff.cpp

@@ -85,6 +85,7 @@ void UpdateTextEffect(TextEffectID te_id, StringID msg)
 void UpdateAllTextEffectVirtCoords()
 {
 	for (auto &te : _text_effects) {
+		if (te.string_id == INVALID_STRING_ID) continue;
 		SetDParam(0, te.params_1);
 		SetDParam(1, te.params_2);
 		te.UpdatePosition(ZOOM_LVL_OUT_8X, te.center, te.top, te.string_id, te.string_id - 1);