Change all pj_memset to pj_bzero(), where applicable

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@582 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjlib/src/pj/os_time_win32.c b/pjlib/src/pj/os_time_win32.c
index 94f0450..e3733f9 100644
--- a/pjlib/src/pj/os_time_win32.c
+++ b/pjlib/src/pj/os_time_win32.c
@@ -102,7 +102,7 @@
     FILETIME ft;
     LARGE_INTEGER li;
 
-    pj_memset(&st, 0, sizeof(st));
+    pj_bzero(&st, sizeof(st));
     st.wYear = (pj_uint16_t) pt->year;
     st.wMonth = (pj_uint16_t) (pt->mon + 1);
     st.wDay = (pj_uint16_t) pt->day;