Resolve "make kzf filter running for climate fir filterc data handler"

Closes #334 (closed)

mlair/helpers/filter.py

@@ -768,6 +768,7 @@ class KolmogorovZurbenkoFilterMovingWindow(KolmogorovZurbenkoBaseClass):
 
 
 def firwin_kzf(m, k):
+    m, k = int(m), int(k)
     coef = np.ones(m)
     for i in range(1, k):
         t = np.zeros((m, m + i * (m - 1)))