cmd-buildextend-metal: set variables at top of main

And also refactor to drop the rc variable.

Author: dustymabe

src/cmd-buildextend-metal

@@ -188,6 +188,10 @@ EOF
 
 
 main() {
+    # Set Some Defaults
+    genprotimgvm=/data.secex/genprotimgvm.qcow2
+    build=
+    force=
 
     # This script is used for creating several artifacts. For example,
     # `cmd-buildextend-qemu` is a symlink to `cmd-buildextend-metal`.
@@ -200,13 +204,7 @@ main() {
         *) fatal "called as unexpected name $0";;
     esac
 
-    # Parse options
-    genprotimgvm=/data.secex/genprotimgvm.qcow2
-    rc=0
-    build=
-    force=
-    options=$(getopt --options h --longoptions help,force,build:,genprotimgvm: -- "$@") || rc=$?
-    [ $rc -eq 0 ] || {
+    options=$(getopt --options h --longoptions help,force,build:,genprotimgvm: -- "$@") || {
         print_help
         exit 1
     }