Merge branch 'jc/am-3-show-corrupted-patch' into maint

* jc/am-3-show-corrupted-patch:
  am -3: recover the diagnostic messages for corrupt patches

git-am.sh

@@ -740,7 +740,7 @@ do
 		;;
 	esac
 
-	if test $apply_status = 1 && test "$threeway" = t
+	if test $apply_status != 0 && test "$threeway" = t
 	then
 		if (fall_back_3way)
 		then