fix mypy drift

Author: mlin

tools/census_contrib/src/census_contrib/save.py

@@ -101,7 +101,7 @@ def roundHalfToEven(a: npt.NDArray[np.float32], keepbits: int) -> npt.NDArray[np
     half_quantum1 = (1 << (maskbits - 1)) - 1
 
     b = a.view(np.uint32)
-    b += ((b >> maskbits) & 1) + half_quantum1
+    b += np.uint32(((b >> maskbits) & 1) + half_quantum1)
     b &= mask
     return a