patch 8.2.3547: opening the quickfix window triggers BufWinEnter twice

Problem:    Opening the quickfix window triggers BufWinEnter twice. (Yorick
            Peterse)
Solution:   Only trigger BufWinEnter with "quickfix". (closes #9022)
diff --git a/src/quickfix.c b/src/quickfix.c
index 7cc83e3..3fb921f 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -4199,13 +4199,14 @@
     {
 	// Use the existing quickfix buffer
 	if (do_ecmd(qf_buf->b_fnum, NULL, NULL, NULL, ECMD_ONE,
-				      ECMD_HIDE + ECMD_OLDBUF, oldwin) == FAIL)
+		    ECMD_HIDE + ECMD_OLDBUF + ECMD_NOWINENTER, oldwin) == FAIL)
 	    return FAIL;
     }
     else
     {
 	// Create a new quickfix buffer
-	if (do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, oldwin) == FAIL)
+	if (do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE + ECMD_NOWINENTER,
+							       oldwin) == FAIL)
 	    return FAIL;
 
 	// save the number of the new buffer