message: Update sum-of-two-integers.cpp
diff: @@ -5,9 +5,9 @@ class Solution {
  public:
  int getSum(int a, int b) {
  while (b) {
  - int carry = a & b;
  + uint32_t carry = a & b;
  a ^= b;
  - b = (unsigned int)carry << 1;
  + b = carry << 1;
  }
  return a;
  }
  