Fix blanks before private in loss_function.h

Change-Id: I068bed6431bc7c9b7958af391655df61499000b2

include/ceres/loss_function.h

diff --git a/include/ceres/loss_function.h b/include/ceres/loss_function.h
index f178991..0c0ceaa 100644
--- a/include/ceres/loss_function.h
+++ b/include/ceres/loss_function.h
@@ -175,6 +175,7 @@
  public:
   explicit HuberLoss(double a) : a_(a), b_(a * a) { }
   virtual void Evaluate(double, double*) const;
+
  private:
   const double a_;
   // b = a^2.
@@ -190,6 +191,7 @@
  public:
   explicit SoftLOneLoss(double a) : b_(a * a), c_(1 / b_) { }
   virtual void Evaluate(double, double*) const;
+
  private:
   // b = a^2.
   const double b_;
@@ -206,6 +208,7 @@
  public:
   explicit CauchyLoss(double a) : b_(a * a), c_(1 / b_) { }
   virtual void Evaluate(double, double*) const;
+
  private:
   // b = a^2.
   const double b_;
@@ -226,6 +229,7 @@
  public:
   explicit ArctanLoss(double a) : a_(a), b_(1 / (a * a)) { }
   virtual void Evaluate(double, double*) const;
+
  private:
   const double a_;
   // b = 1 / a^2.