instant: partially revert commit bc96e6f1ff. remove 'HACK' :)

instant should fail if the locale xlation db cannot be opened.

The reason this was failing was because the locale translation DB for
linux did not exist (Linux.lcx).  I didn't add it until weeks/months
later :)

There needs to be one for each platform called "$(uname -s).lcx".
FreeBSD will need one too.

cde/programs/dtdocbook/instant/main.c

@@ -147,11 +147,7 @@ if (ret != 0) {
     fprintf(stderr,
             "Warning: could not open locale translation database. %d\n", ret);
 
-/* HACK For some reason on linux this function fails, but isn't completely fatal */
-#if !defined(linux)
     exit(1);
-#endif
-
 }
 
 if (_DtLcxXlateStdToOp(myDb,