Check early that the config target exists and isn't a template

Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6885)

Configure

@@ -1034,11 +1034,12 @@ if ($d) {
 	$target = $t;
     }
 }
+
+&usage if !$table{$target} || $table{$target}->{template};
+
 $config{target} = $target;
 my %target = resolve_config($target);
 
-&usage if (!%target || $target{template});
-
 foreach (keys %target_attr_translate) {
     $target{$target_attr_translate{$_}} = $target{$_}
         if $target{$_};