Rename __WINE__ to __WINESRC__.

diff --git a/include/prsht.h b/include/prsht.h
index 24f6fb7..f964711 100644
--- a/include/prsht.h
+++ b/include/prsht.h
@@ -264,7 +264,7 @@
 #define PSH_WIZARD_LITE         0x00400000
 #define PSH_WIZARD97_NEW        0x01000000 /* for IE >= 5 */
 #define PSH_NOCONTEXTHELP       0x02000000
-#ifndef __WINE__
+#ifndef __WINESRC__
 # if _WIN32_IE < 0x0500
 #  define PSH_WIZARD97          PSH_WIZARD97_OLD
 # else