Fix up ambiguous call to std::sqrt

git-svn-id: https://svn.dealii.org/trunk@4760 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/tests/fe/mapping_c1.cc b/tests/fe/mapping_c1.cc
index 3286c4522ea97e2879812b4fd311f3bb199e5fc4..9b25c8d481dc7b69aef0915f84d179dae8b1e037 100644 (file)
--- a/tests/fe/mapping_c1.cc
+++ b/tests/fe/mapping_c1.cc
@@ -33,7 +33,7 @@ int main ()
                                   // in the quality of the mesh, this
                                   // is ok
   Point<2> center;
-  HyperBallBoundary<2> circle(center, std::sqrt(2));
+  HyperBallBoundary<2> circle(center, std::sqrt(2.0));
   Triangulation<2> tria;
   GridGenerator::hyper_cube(tria, -1, 1);
   tria.set_boundary (0, circle);