add check for inf, if inf, mark as not same

Author: auderson

pandas/_libs/window/aggregations.pyx

@@ -310,7 +310,7 @@ cdef inline void add_var(float64_t val, float64_t *nobs, float64_t *mean_x,
     nobs[0] = nobs[0] + 1
 
     # GH#42064, record num of same values to remove floating point artifacts
-    if val == prev_value[0] and val != np.inf and val != np.NINF:
+    if val == prev_value[0]:
         num_consecutive_same_value[0] += 1
     else:
         # reset to 1 (include current value itself)