lib: fix clang build warnings

[notmuch] / lib / thread.cc

diff --git a/lib/thread.cc b/lib/thread.cc
index 45425056034fca555d8c679d670800872813ba13..9847cf8bfc868d6b63e24a8ff56eb2943e997d36 100644 (file)
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -251,8 +251,8 @@ _thread_add_message (notmuch_thread_t *thread,
                 term != NULL;
                 term = term->next)
            {
-               /* We ignore initial 'K'. */
-               if (strcmp(tag, (term->string + 1)) == 0) {
+               /* Check for an empty string, and then ignore initial 'K'. */
+               if (*(term->string) && strcmp(tag, (term->string + 1)) == 0) {
                    message_excluded = TRUE;
                    break;
                }
@@ -353,10 +353,8 @@ _thread_add_matched_message (notmuch_thread_t *thread,
 {
     time_t date;
     notmuch_message_t *hashed_message;
-    const char *cur_subject;
 
     date = notmuch_message_get_date (message);
-    cur_subject = notmuch_thread_get_subject(thread);
 
     if (date < thread->oldest || ! thread->matched_messages) {
        thread->oldest = date;
@@ -366,6 +364,7 @@ _thread_add_matched_message (notmuch_thread_t *thread,
 
     if (date > thread->newest || ! thread->matched_messages) {
        thread->newest = date;
+       const char *cur_subject = notmuch_thread_get_subject(thread);
        if (sort != NOTMUCH_SORT_OLDEST_FIRST || EMPTY_STRING(cur_subject))
            _thread_set_subject_from_message (thread, message);
     }