updated for version 7.2.428

Problem:    Using setqflist([]) to clear the error list doesn't work properly.
Solution:   Set qf_nonevalid to TRUE when appropriate. (Christian Brabandt)

src/quickfix.c

@@ -3654,6 +3654,10 @@ set_errorlist(wp, list, action)
 	}
     }
 
+    if (qi->qf_lists[qi->qf_curlist].qf_index == 0)
+	/* empty list or no valid entry */
+	qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
+    else
 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
     qi->qf_lists[qi->qf_curlist].qf_index = 1;

src/version.c

@@ -681,6 +681,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    428,
 /**/
     427,
 /**/