Throw error when compiled.php exists

src/Barryvdh/LaravelIdeHelper/GeneratorCommand.php

@@ -52,6 +52,9 @@ class GeneratorCommand extends Command {
      */
     public function fire()
     {
+        if (file_exists($compiled = base_path().'/bootstrap/compiled.php')){
+            $this->error('Error: first delete bootstrap/compiled.php (php artisan clear-compiled)');
+        }else{
             $filename = $this->argument('filename');
     
             if($this->option('memory')){
@@ -79,7 +82,7 @@ class GeneratorCommand extends Command {
             }else{
                 $this->error("The helper file could not be created at $filename");
             }
-
+        }    
     }
 
     protected function useMemoryDriver(){