Added more info for pj_dump_config

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@75 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjlib/src/pj/os_timestamp_win32.c b/pjlib/src/pj/os_timestamp_win32.c
index 757a300..5b63529 100644
--- a/pjlib/src/pj/os_timestamp_win32.c
+++ b/pjlib/src/pj/os_timestamp_win32.c
@@ -22,6 +22,7 @@
 
 #if defined(PJ_TIMESTAMP_USE_RDTSC) && PJ_TIMESTAMP_USE_RDTSC!=0 && \
     defined(PJ_M_I386) && PJ_M_I386 != 0 && \
+    defined(PJ_HAS_PENTIUM) && PJ_HAS_PENTIUM!=0 && \
     defined(_MSC_VER)
 /*
  * Use rdtsc to get the OS timestamp.