patch 8.1.2373: cannot build with +popupwin but without +quickfix

Problem:    Cannot build with +popupwin but without +quickfix. (John Marriott)
Solution:   Adjust #ifdefs.
diff --git a/src/fileio.c b/src/fileio.c
index 802b997..c15c7bd 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -3366,7 +3366,7 @@
     }
     status_redraw_all();
     redraw_tabline = TRUE;
-#ifdef FEAT_PROP_POPUP
+#if defined(FEAT_PROP_POPUP) && defined(FEAT_QUICKFIX)
     popup_update_preview_title();
 #endif
 }