Minor fixes

collected during switch to clang, but unrelated. Wanna merge them separately. Have a closer look at a304e27fa735385b5c1432dfdda66d42f734aad7


There is not? Hm, how is it going to be installed? All to-be-used files should reside in the install-folder -- using files from the source-tree makes a lot of stuff very complicated and should not happen?