fix bug in 3rdparty lib

diff --git a/3rdparty/when/When.php b/3rdparty/when/When.php
index 5f97f0eb9bf3ed4e8c7a351efbf9f0e1684250c9..f8bb9db0f670e94f117db12e9a48329233534863 100755 (executable)
--- a/3rdparty/when/When.php
+++ b/3rdparty/when/When.php
@@ -586,7 +586,7 @@ class When
                                }
                        }
                }
-               elseif($this->gobyday || $interval == "month")
+               elseif($this->gobyday && $interval == "month")
                {
                        $_mdays = range(1, date('t',mktime(0,0,0,$month,1,$year)));
                        foreach($_mdays as $_mday)
@@ -621,7 +621,7 @@ class When
                
                if($interval == "month")
                {
-                       $this->try_date->modify('last day of ' . $this->interval . ' ' . $interval);
+                       $this->try_date->modify('+1 month');
                }
                else
                {