* win32/win32.c (unixtime_to_filetime): should check the return value

of localtime().  reported by snowjail at gmail.com.
  [ruby-dev:44838] [Bug #5596]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33685 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Wed Nov  9 16:40:49 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* win32/win32.c (unixtime_to_filetime): should check the return value
+	  of localtime().  reported by snowjail at gmail.com.
+	  [ruby-dev:44838] [Bug #5596]
+
 Thu Nov 10 05:17:25 2011  Koichi Sasada  <ko1@atdot.net>
 
 	* cont.c (rb_fiber_m_transfer, rb_fiber_resume): prohibit using

win32/win32.c

@@ -5758,6 +5758,9 @@ unixtime_to_filetime(time_t time, FILETIME *ft)
     FILETIME lt;
 
     tm = localtime(&time);
+    if (!tm) {
+	return -1;
+    }
     st.wYear = tm->tm_year + 1900;
     st.wMonth = tm->tm_mon + 1;
     st.wDayOfWeek = tm->tm_wday;