Fix CMake error (missing quotes, thx to Gerhard)
Fix CMake error (missing quotes, thx to Gerhard)

live-clones/netgen,live-clones/netgen,live-clones/netgen,looooo/netgen,looooo/netgen,live-clones/netgen,looooo/netgen,looooo/netgen,live-clones/netgen,live-clones/netgen,looooo/netgen,looooo/netgen