fix off-by-one error when calculating totsize in read_file(), introduced

when totsize was converted to hold the total number of multibyte
characters


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2308 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/files.c

@@ -296,6 +296,7 @@ void read_file(FILE *f, const char *filename)
 	} else if (fileptr->next == NULL) {
 	    filebot = fileptr;
 	    new_magicline();
+	    totsize--;
 	}
     }