Fix for GH12541

Author: Giacomo Ferroni

pandas/core/window.py

@@ -762,17 +762,7 @@ def count(self):
 
  results = []
  for b in blocks:
-
- if needs_i8_conversion(b.values):
- result = b.notnull().astype(int)
- else:
- try:
- result = np.isfinite(b).astype(float)
- except TypeError:
- result = np.isfinite(b.astype(float)).astype(float)
-
- result[pd.isnull(result)] = 0
-
+ result = b.notnull().astype(int)
  result = self._constructor(result, window=window, min_periods=0,
  center=self.center).sum()
  results.append(result)