Add NOTMUCH_EXCLUDE_FLAG to notmuch_exclude_t so that it can
cover all four values of search --exclude in the cli.
---
 lib/notmuch.h    |    1 +
 lib/query.cc     |    6 ++++--
 notmuch-search.c |    2 +-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/notmuch.h b/lib/notmuch.h
index 1280afd..f4381ae 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -504,6 +504,7 @@ notmuch_query_get_query_string (notmuch_query_t *query);
 typedef enum {
     NOTMUCH_EXCLUDE_FALSE,
     NOTMUCH_EXCLUDE_TRUE,
+    NOTMUCH_EXCLUDE_FLAG,
     NOTMUCH_EXCLUDE_ALL
 } notmuch_exclude_t;
 
diff --git a/lib/query.cc b/lib/query.cc
index f752452..1e0f292 100644
--- a/lib/query.cc
+++ b/lib/query.cc
@@ -221,10 +221,12 @@ notmuch_query_search_messages (notmuch_query_t *query)
 	if (query->exclude_terms) {
 	    exclude_query = _notmuch_exclude_tags (query, final_query);
 
-	    if (query->omit_excluded != NOTMUCH_EXCLUDE_FALSE)
+	    if (query->omit_excluded == NOTMUCH_EXCLUDE_TRUE ||
+		query->omit_excluded == NOTMUCH_EXCLUDE_ALL)
+	    {
 		final_query = Xapian::Query (Xapian::Query::OP_AND_NOT,
 					     final_query, exclude_query);
-	    else {
+	    } else {
 		exclude_query = Xapian::Query (Xapian::Query::OP_AND,
 					   exclude_query, final_query);
 
diff --git a/notmuch-search.c b/notmuch-search.c
index 89b5bf9..027923d 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -527,7 +527,7 @@ notmuch_search_command (void *ctx, int argc, char *argv[])
 	for (i = 0; i < search_exclude_tags_length; i++)
 	    notmuch_query_add_tag_exclude (query, search_exclude_tags[i]);
 	if (exclude == EXCLUDE_FLAG)
-	    notmuch_query_set_omit_excluded (query, NOTMUCH_EXCLUDE_FALSE);
+	    notmuch_query_set_omit_excluded (query, NOTMUCH_EXCLUDE_FLAG);
 	if (exclude == EXCLUDE_ALL)
 	    notmuch_query_set_omit_excluded (query, NOTMUCH_EXCLUDE_ALL);
     }
-- 
1.7.4.4