Also report the previous line when going backwards in time.

This is because half of the time, the previous line is the one that is
wrong, so you get redirected to line X, where X-1 has the error, and you
wonder because line X looks just fine.

Sponsored by:	Absolight

Tools/scripts/MOVEDlint.awk

@@ -82,7 +82,9 @@ $3 !~ /^20[0-3][0-9]-[01][0-9]-[0-3][0-9]$/ {
     srcs[$1] = 1
 
     if (lastdate > $3) {
-        printf "%5d: date going backwards from %s to %s\n", NR, lastdate, $3 | sort
+        printf "%5d: date going backwards from %s to %s from this line\n", NR-1, lastdate, $3 | sort
+        error[NR-1] = 1
+        printf "%5d: date going backwards from %s to %s to this line\n", NR, lastdate, $3 | sort
         error[NR] = 1
     }
     lastdate = $3