Cast to int after integer division

Author: xylar

mpas_analysis/ocean/index_nino34.py

@@ -397,7 +397,7 @@ def _running_mean(self, inputData, wgts):  # {{{
         """
 
         nt = len(inputData)
-        sp = (len(wgts) - 1)/2
+        sp = int((len(wgts) - 1)/2)
         runningMean = inputData.copy()
         for k in range(sp, nt-(sp+1)):
             runningMean[k] = sum(wgts*inputData[k-sp:k+sp+1].values)