Fix bug in compileInsert with empty values with SQLite.

Author: mathieutu

src/Illuminate/Database/Query/Grammars/SQLiteGrammar.php

@@ -153,6 +153,10 @@ public function compileInsert(Builder $query, array $values)
         // grammar insert builder because no special syntax is needed for the single
         // row inserts in SQLite. However, if there are multiples, we'll continue.
         if (count($values) == 1) {
+            if (empty(reset($values))) {
+                return "insert into $table default values";
+            }
+
             return parent::compileInsert($query, reset($values));
         }