Added a poor-man test to --directory switch.

master.sh

@@ -127,11 +127,20 @@ while test $# -gt 0 ; do
     --directory | -D )
       test $# = 1 && eval "$exit_missing_arg"
       shift
+      case $1 in
+        -* )
+          echo -e "\n$1 isn't a valid build directory\n."
+          echo -e "Directory names can't start with - .\n"
+          exit 1
+          ;;
+        * )
           BUILDDIR=$1
           JHALFSDIR=$BUILDDIR/jhalfs
           LOGDIR=$JHALFSDIR/logs
           MKFILE=$JHALFSDIR/Makefile
           ;;
+      esac
+      ;;
 
     --get-packages | -G )  HPKG=1    ;;