fix color breakage; also, in main(), when opening files with

fix color breakage; also, in main(), when opening files with
"+LINE,COLUMN" arguments on the command line, don't update the screen
when moving to their specified lines and columns

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2873 35c25a1d-7b9e-4130-9fde-d3aeb78583b8