Patch to backport noNullPoints support to Graphite webapp 0.9.15

noNullPoints.patch

diff --git a/webapp/graphite/render/views.py b/webapp/graphite/render/views.py
index 62ad20e..b15b012 100644
--- a/webapp/graphite/render/views.py
+++ b/webapp/graphite/render/views.py
@@ -153,6 +153,15 @@ def renderView(request):
             timestamps = range(int(series.start), int(series.end) + 1, int(series.step))
           datapoints = zip(series, timestamps)
           series_data.append(dict(target=series.name, datapoints=datapoints))
+      elif 'noNullPoints' in requestOptions and any(data):
+        for series in data:
+          values = []
+          for (index,v) in enumerate(series):
+            if v is not None:
+              timestamp = series.start + (index * series.step)
+              values.append((v,timestamp))
+          if len(values) > 0:
+            series_data.append(dict(target=series.name, datapoints=values))
       else:
         for series in data:
           timestamps = range(int(series.start), int(series.end) + 1, int(series.step))
@@ -264,6 +273,8 @@ def parseOptions(request):
     requestOptions['noCache'] = True
   if 'maxDataPoints' in queryParams and queryParams['maxDataPoints'].isdigit():
     requestOptions['maxDataPoints'] = int(queryParams['maxDataPoints'])
+  if 'noNullPoints' in queryParams:
+    requestOptions['noNullPoints'] = True
 
   requestOptions['localOnly'] = queryParams.get('local') == '1'