Misspelled class property in db class.  _like_escape_chr, not _like_escape_char

http://codeigniter.com/bug_tracker/bug/9518/
diff --git a/system/database/DB_active_rec.php b/system/database/DB_active_rec.php
index bf4d511..a3abff1 100644
--- a/system/database/DB_active_rec.php
+++ b/system/database/DB_active_rec.php
@@ -725,7 +725,7 @@
 			// some platforms require an escape sequence definition for LIKE wildcards
 			if ($this->_like_escape_str != '')
 			{
-				$like_statement = $like_statement.sprintf($this->_like_escape_str, $this->_like_escape_char);
+				$like_statement = $like_statement.sprintf($this->_like_escape_str, $this->_like_escape_chr);
 			}
 			
 			$this->ar_like[] = $like_statement;