in configure.ac, if regex.h isn't found, display an error message if we
try to enable color support; also, fix the spacing of the error message
displayed when slcurses.h isn't found


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3781 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
2 files changed