CMake: Fix build failure when Urho3D uses multiple languages (C/CXX). Thanks to @gleblebedev.
CMake: Fix build failure when Urho3D uses multiple languages (C/CXX). Thanks to @gleblebedev.

rokups/Urho3D,rokups/Urho3D,rokups/Urho3D,rokups/Urho3D,rokups/Urho3D,rokups/Urho3D