patch 8.2.0050: after deleting a file mark it is still in viminfo

Problem:    After deleting a file mark it is still in viminfo.
Solution:   When a file mark was deleted more recently than the mark in the
            merged viminfo file was updated, do not store the mark. (Pavol
            Juhas, closes #5401, closes #1339)
diff --git a/src/viminfo.c b/src/viminfo.c
index fd2be5f..308a9a6 100644
--- a/src/viminfo.c
+++ b/src/viminfo.c
@@ -2055,8 +2055,7 @@
     for (i = 0; i < NMARKS; i++)
     {
 	if (vi_namedfm != NULL
-			&& (vi_namedfm[i].time_set > namedfm_p[i].time_set
-			    || namedfm_p[i].fmark.mark.lnum == 0))
+			&& (vi_namedfm[i].time_set > namedfm_p[i].time_set))
 	    fm = &vi_namedfm[i];
 	else
 	    fm = &namedfm_p[i];