Do not divide by zero in analyze_brprob.py

	* analyze_brprob.py: If there's no loop, do not calculate
	average number of loop iterations.

From-SVN: r238590

contrib/ChangeLog

+2016-07-21  Martin Liska  <mliska@suse.cz>
+
+	* analyze_brprob.py: If there's no loop, do not calculate
+	average number of loop iterations.
+
 2016-06-24  Martin Liska  <mliska@suse.cz>
 
 	* analyze_brprob.py: Parse and display average number

contrib/analyze_brprob.py

@@ -149,6 +149,7 @@ class Profile:
              percentage(v.hits, v.count), percentage(v.fits, v.count),
              v.count, v.count_formatted(), percentage(v.count, self.count_max()) ))
 
+        if len(self.niter_vector) > 0:
             print ('\nLoop count: %d' % len(self.niter_vector)),
             print('  avg. # of iter: %.2f' % average(self.niter_vector))
             print('  median # of iter: %.2f' % median(self.niter_vector))