Fix memset arguments, from Oliver Kaiser.

--HG--
branch : HEAD
diff --git a/THANKS b/THANKS
index fda9652..a628d73 100644
--- a/THANKS
+++ b/THANKS
@@ -7,6 +7,7 @@
 Heiko Hund <heiko@ist.eigentlich.net>
 Joel Ebrahimi <joel.ebrahimi@gmail.com>
 Mikhail Gusarov <dottedmag@dottedmag.net>.
+Oliver Kaiser <under.northern.sky@googlemail.com>
 Patrick Spendrin <ps_ml@gmx.de>
 Pierre Joye <pierre.php@gmail.com>
 Rick Carback <carback1@umbc.edu>
diff --git a/lib/zip_dirent.c b/lib/zip_dirent.c
index adbf96c..b5b9d27 100644
--- a/lib/zip_dirent.c
+++ b/lib/zip_dirent.c
@@ -474,7 +474,7 @@
 {
     struct tm tm;
 
-    memset(&tm, sizeof(tm), 0);
+    memset(&tm, 0, sizeof(tm));
     
     /* let mktime decide if DST is in effect */
     tm.tm_isdst = -1;