Fix two bugs.

1. ProblemEvaluateResidualTest was leaking the loss_function in cases
where it was not being used.
2. Fix a grammo in rotation.h

Change-Id: If94ae1624033c8f6d1934dc2f40fa0dfe4e025c3

include/ceres/rotation.h

diff --git a/include/ceres/rotation.h b/include/ceres/rotation.h
index 71d64e2..8ba58ab 100644
--- a/include/ceres/rotation.h
+++ b/include/ceres/rotation.h
@@ -211,7 +211,7 @@
 
 // xy = x cross y;
 //
-// Inplace cross product is not support. The resulting vector x_cross_y must not
+// Inplace cross product is not supported. The resulting vector x_cross_y must not
 // share the memory with the input vectors x and y, otherwise the result will be
 // undefined.
 template<typename T> inline

internal/ceres/problem_test.cc

diff --git a/internal/ceres/problem_test.cc b/internal/ceres/problem_test.cc
index 03e8da7..3613dd6 100644
--- a/internal/ceres/problem_test.cc
+++ b/internal/ceres/problem_test.cc
@@ -1554,11 +1554,6 @@
   static double kLossFunctionScale;
 
  protected:
-  void SetUp() {
-    loss_function_ = new ScaledLoss(nullptr, 2.0, TAKE_OWNERSHIP);
-  }
-
-  LossFunction* loss_function_;
   ProblemImpl problem_;
   double x_[2] = {1, 2};
   double y_[3] = {1, 2, 3};
@@ -1712,8 +1707,11 @@
 }
 
 TEST_F(ProblemEvaluateResidualBlockTest, OneResidualBlockWithLossFunction) {
-  ResidualBlockId residual_block_id = problem_.AddResidualBlock(
-      IdentityFunctor::Create(), loss_function_, x_, y_);
+  ResidualBlockId residual_block_id =
+      problem_.AddResidualBlock(IdentityFunctor::Create(),
+                                new ScaledLoss(nullptr, 2.0, TAKE_OWNERSHIP),
+                                x_,
+                                y_);
   Vector expected_f(5);
   expected_f << 1, 2, 1, 2, 3;
   expected_f *= std::sqrt(kLossFunctionScale);
@@ -1756,8 +1754,11 @@
 
 TEST_F(ProblemEvaluateResidualBlockTest,
        OneResidualBlockWithLossFunctionDisabled) {
-  ResidualBlockId residual_block_id = problem_.AddResidualBlock(
-      IdentityFunctor::Create(), loss_function_, x_, y_);
+  ResidualBlockId residual_block_id =
+      problem_.AddResidualBlock(IdentityFunctor::Create(),
+                                new ScaledLoss(nullptr, 2.0, TAKE_OWNERSHIP),
+                                x_,
+                                y_);
   Vector expected_f(5);
   expected_f << 1, 2, 1, 2, 3;
   Matrix expected_dfdx = Matrix::Zero(5, 2);