user-manual: reset to ORIG_HEAD not HEAD to undo merge

diff --git a/diffcore.h b/diffcore.h
index 2249bc2c05744ce5026744547fcb30195a19b3f1..1ea80671e30500f95fc1b648ccc6d5143ac0ac52 100644 (file)
--- a/diffcore.h
+++ b/diffcore.h
@@ -54,9 +54,9 @@ struct diff_filepair {
        unsigned source_stays : 1; /* all of R/C are copies */
        unsigned broken_pair : 1;
        unsigned renamed_pair : 1;
+       unsigned is_unmerged : 1;
 };
-#define DIFF_PAIR_UNMERGED(p) \
-       (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
+#define DIFF_PAIR_UNMERGED(p) ((p)->is_unmerged)
 
 #define DIFF_PAIR_RENAME(p) ((p)->renamed_pair)