Ignore final hyphen in column name when requoting

An expression like "Foo"."bar"->'prop' should not be re-quoted as
"Foo"."bar-">'prop'. Bare columns cannot include hyphens in most DBs
anyways.

lib/Cake/Model/Datasource/DboSource.php

@@ -2884,7 +2884,7 @@ protected function _quoteFields($conditions) {
 		// Remove quotes and requote all the Model.field names.
 		$conditions = str_replace(array($start, $end), '', $conditions);
 		$conditions = preg_replace_callback(
-			'/(?:[\'\"][^\'\"\\\]*(?:\\\.[^\'\"\\\]*)*[\'\"])|([a-z0-9_][a-z0-9\\-_]*\\.[a-z0-9_][a-z0-9_\\-]*)/i',
+			'/(?:[\'\"][^\'\"\\\]*(?:\\\.[^\'\"\\\]*)*[\'\"])|([a-z0-9_][a-z0-9\\-_]*\\.[a-z0-9_][a-z0-9_\\-]*[a-z0-9_])/i',
 			array(&$this, '_quoteMatchedField'),
 			$conditions
 		);