cosmetic: add comment on ignored return value

Coverity wants us to evaluate sqlite3_reset, but it is of no use to do so.

Related: coverity CID#178653
Change-Id: I64ac8c148f48be60f9c0d346df0c5152bb527494
diff --git a/src/db.c b/src/db.c
index 8733cf5..d16f8ec 100644
--- a/src/db.c
+++ b/src/db.c
@@ -99,6 +99,8 @@
 void db_remove_reset(sqlite3_stmt *stmt)
 {
 	sqlite3_clear_bindings(stmt);
+	/* sqlite3_reset() just repeats an error code already evaluated during sqlite3_step(). */
+	/* coverity[CHECKED_RETURN] */
 	sqlite3_reset(stmt);
 }