Use the standard _WIN32, not the Torism MS_WINDOWS or deprecated WIN32

This commit is completely mechanical; I used this perl script to make it:

 #!/usr/bin/perl -w -i.bak -p

 if (/^\s*\#/) {
     s/MS_WINDOWS/_WIN32/g;
     s/\bWIN32\b/_WIN32/g;
 }

1 files changed, 1 insertions, 1 deletions

diff --git a/src/or/eventdns.h b/src/or/eventdns.h
index 3ff8bba4b6..1c130b2a12 100644
--- a/src/or/eventdns.h
+++ b/src/or/eventdns.h
@@ -273,7 +273,7 @@ int evdns_resolve_reverse(const struct in_addr *in, int flags, evdns_callback_ty
 int evdns_resolve_reverse_ipv6(const struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr);
 int evdns_set_option(const char *option, const char *val, int flags);
 int evdns_resolv_conf_parse(int flags, const char *);
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 int evdns_config_windows_nameservers(void);
 #endif
 void evdns_search_clear(void);