Don't check if the job exists if we are going to ignore the result

Now that we're lazy loading builds, calling getBuildByNumber is not cheap.
So evaluate the 'ignore' flag before trying to load the build.

core/src/main/java/hudson/tasks/Fingerprinter.java

@@ -438,7 +438,7 @@ public class Fingerprinter extends Recorder implements Serializable, DependecyDe
                 if (job==null)  continue;   // project no longer exists
                 if (job.getParent()==build.getParent())
                     continue;   // we are the parent of the build owner, that is almost like we are the owner 
-                if(job.getBuildByNumber(bp.getNumber())==null && !includeMissing)
+                if(!includeMissing && job.getBuildByNumber(bp.getNumber())==null)
                     continue;               // build no longer exists
 
                 Integer existing = r.get(job);