patch 8.2.3018: 'quickfixtextfunc' formatting is lost when switching buffers

Problem:    Formatting using quickfixtextfunc is lost when updating location
            lists for different buffers.  (Yorick Peterse)
Solution:   Use the right window for the locaiton list. (Yegappan Lakshmanan,
            closes #8400, closes #8403)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3018,
 /**/
     3017,
 /**/