Install: fix db connection as admin check (#1049)

Commit 4271855 (issue #22400)
introduced a regression in the installer, causing the 'Attempting to
connect to database as admin' check to fail for new installations, even
though the Admin user ID and password are correct.

Fixes #22510

admin/install.php

@@ -408,17 +408,17 @@ function print_test( $p_test_description, $p_result, $p_hard_fail = true, $p_mes
 	$t_result = @$g_db->Connect( $f_hostname, $f_admin_username, $f_admin_password );
 
 	if( $t_result ) {
-		# check if db exists for the admin
-		$t_result = @$g_db->Connect( $f_hostname, $f_admin_username, $f_admin_password, $f_database_name );
-	}
-	if( $t_result ) {
-		$t_db_open = true;
-		$f_db_exists = true;
-
 		# due to a bug in ADODB, this call prompts warnings, hence the @
 		# the check only works on mysql if the database is open
 		$t_version_info = @$g_db->ServerInfo();
 
+		# check if db exists for the admin
+		$t_result = @$g_db->Connect( $f_hostname, $f_admin_username, $f_admin_password, $f_database_name );
+		if( $t_result ) {
+			$t_db_open = true;
+			$f_db_exists = true;
+		}
+
 		print_test_result( GOOD );
 	} else {
 		print_test_result( BAD, true, 'Does administrative user have access to the database? ( ' . db_error_msg() . ' )' );