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/ex_cmds.c b/src/ex_cmds.c
index 78f2bcc..a1eecc5 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -3016,7 +3016,7 @@
 #ifdef FEAT_TITLE
 	maketitle();
 #endif
-#ifdef FEAT_PROP_POPUP
+#if defined(FEAT_PROP_POPUP) && defined(FEAT_QUICKFIX)
 	if (WIN_IS_POPUP(curwin) && curwin->w_p_pvw && retval != FAIL)
 	    popup_set_title(curwin);
 #endif