libtt: Fixes for Coverity fixes that I thought I'd already fixed.

cde/lib/tt/mini_isam/isfcb.c

@@ -648,7 +648,6 @@ _create_datfile(isfname)
 	
 	fd = open (namebuf, O_CREAT | O_EXCL | O_RDWR, 0666);
 	if (fd > -1) {
-		fcntl(fd, F_SETFD, 1);	/* Close on exec */
 		/* Close on exec */
 		if(fcntl(fd, F_SETFD, 1) == -1) {
 			close(fd);

cde/lib/tt/mini_isam/isrepair.c

@@ -318,6 +318,7 @@ isrepair(isfname, verbose)
   (void)sigprocmask(SIG_SETMASK, &oldmask, NULL);
 
   print("...File repaired\n");
+  if (buffer != Buffer) free(buffer);
   return (ISOK);
 
  ERROR: