Fix a memory leak in CXSparse::SolveCholesky.

Thanks to Alexander Mordvintsev for reporting this.

Change-Id: I5c6be4d3d28f062e83a1ad41cb8089c19362a005

internal/ceres/cxsparse.cc

@@ -57,6 +57,7 @@ bool CXSparse::SolveCholesky(cs_di* A,
       cs_free(scratch_);
     }
     scratch_ = reinterpret_cast<CS_ENTRY*>(cs_malloc(A->n, sizeof(CS_ENTRY)));
+    scratch_size_ = A->n;
   }
 
   // Solve using Cholesky factorization

internal/ceres/trust_region_minimizer_test.cc

@@ -370,7 +370,7 @@ TEST(TrustRegionMinimizer, JacobiScalingTest) {
   EXPECT_LE(summary.final_cost, 1e-10);
 
   for (int i = 0; i < N; i++) {
-    delete y[i];
+    delete []y[i];
   }
 }