fix test codim_one/error_estimator_02

fixes dealii/tests/codim_one/error_estimator_02.cc:75:9: warning: using
integer absolute value function 'abs' when argument is of floating point
type [-Wabsolute-value]
    if (abs(p(1)-1.0)<1e-5)

diff --git a/tests/codim_one/error_estimator_02.cc b/tests/codim_one/error_estimator_02.cc
index d4cfb46f98df6e81b92b19694d184d087b45f760..f79059a0ecb0bb723846ff8dfc95d0c8a67918ec 100644 (file)
--- a/tests/codim_one/error_estimator_02.cc
+++ b/tests/codim_one/error_estimator_02.cc
@@ -72,7 +72,7 @@ public:
                         const unsigned int  component) const
   {
     double val = 0.0;
-    if (abs(p(1)-1.0)<1e-5)
+    if (std::abs(p(1)-1.0)<1e-5)
       val = 2.0;
 
     deallog << "evaluate normal derivative at " << p << " with value " << val << std::endl;