Fixed ISSUE #171: "Guest users can start builds via direct URLs"

Submitted by:  Vladimir Sizikov
Reviewed by:   Kohsuke


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@1234 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Project.java

@@ -493,6 +493,9 @@ public class Project extends Job<Project,Build> {
      * Schedules a new build command.
      */
     public void doBuild( StaplerRequest req, StaplerResponse rsp ) throws IOException, ServletException {
+        if(!Hudson.adminCheck(req,rsp))
+            return;
+
         scheduleBuild();
         rsp.forwardToPreviousPage(req);
     }