message: Minor refactoring in Mine
diff: @@ -52,16 +52,16 @@ private:
  Mine& operator=(const Mine&) = delete;
  private:
  - int mAge; /**< Age of the mine in turns. */
  - int mDepth; /**< Depth of the Mine. */
  + int mAge = 0; /**< Age of the mine in turns. */
  + int mDepth = 0; /**< Depth of the Mine. */
  - int mCommonMetalYield; /**< */
  - int mRareMetalYield; /**< */
  - int mCommonMineralYield; /**< */
  - int mRareMineralYield; /**< */
  + int mCommonMetalYield = 0; /**< */
  + int mRareMetalYield = 0; /**< */
  + int mCommonMineralYield = 0; /**< */
  + int mRareMineralYield = 0; /**< */
  - MineProductionRate mProductionRate; /**< Mine's production rate. */
  + MineProductionRate mProductionRate = PRODUCTION_RATE_LOW; /**< Mine's production rate. */
  - bool mActive; /**< Flag indicating whether this mine is active or not. */
  - bool mExhausted; /**< Flag indicating that this mine can no longer produce anything. */
  + bool mActive = false; /**< Flag indicating whether this mine is active or not. */
  + bool mExhausted = false; /**< Flag indicating that this mine can no longer produce anything. */
  };
  