Build fails on systems with libtinfo separate from libncurses

[steils]

[100%] Linking CXX executable umoria/umoria
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/umoria.dir/src/ui_io.cpp.o: undefined reference to symbol 'keypad'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: /lib64/libtinfo.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/umoria.dir/build.make:836: umoria/umoria] Error 1
make[1]: *** [CMakeFiles/Makefile2:73: CMakeFiles/umoria.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

See also: https://bugs.gentoo.org/677672

[steils]

CMake looks for tinfo only if CURSES_USE_NCURSES is true. So set(CURSES_USE_NCURSES TRUE) should fix it. Anyway ncurses is needed.

[xgqt]

thx for being the only answer to the same problem I had ;D