Fix -Wstrict-bool compiler warnings.

src/lib-index/mail-index-sync-update.c

@@ -967,7 +967,7 @@ int mail_index_sync_map(struct mail_index_map **_map,
 				"seq=%u offset=%"PRIuUOFF_T": %s "
 				"(initial_mapped=%d, reason=%s)", index->filepath,
 				map->hdr.log_file_seq, start_offset, reason,
-				index->initial_mapped, sync_reason);
+				index->initial_mapped ? 1 : 0, sync_reason);
 			(void)mail_index_fsck(index);
 		}
 		/* can't use it. sync by re-reading index. */

src/lib/sha3.c

@@ -151,7 +151,7 @@ void sha3_loop(void *context, const void *data, size_t len)
 		return;
 	}
 
-	if(old_tail) { /* will have one word to process */
+	if(old_tail != 0) { /* will have one word to process */
 		/* endian-independent code follows: */
 		len -= old_tail;
 		while (old_tail-- > 0)