Fix option parsing

Author: jvazquez-r7

modules/auxiliary/admin/http/jboss_bshdeployer.rb

@@ -126,8 +126,9 @@ def run
 
     case action.name
     when 'Deploy'
-      unless File.exist?(datastore['WARFILE'])
+      unless datastore['WARFILE'] && File.exist?(datastore['WARFILE'])
         print_error("WAR file not found")
+        return
       end
       war_data = File.read(datastore['WARFILE'])
       deploy_action(app_base, war_data)