Fix a bug in insertMany

sqlite.js

@@ -175,6 +175,11 @@ Database.prototype.insertMany = function (table, columns, rows, callback) {
   var placeholdersFragment = [];
   var i = columns.length;
 
+  if (!rows.length) {
+    callback();
+    return;
+  }
+
   while (i--) {
     placeholdersFragment.push('?');
   }

src/database.h

@@ -36,7 +36,7 @@ class Database : public EventEmitter {
 
     ~Database() {
       assert(db_ == NULL);
-      printf("Destroying statement\n");
+      printf("Destroying database\n");
     }
 
     static Handle<Value> New(const Arguments& args);