HWND already typedef'ed when compiling with EMX (OS/2).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16781 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/isql.h

@@ -55,8 +55,10 @@
 #define CALLBACK
 #define SQL_API				EXPORT CALLBACK
 
+#ifndef __EMX__
 typedef void *HWND;
 #endif
+#endif
 
 typedef void *SQLHWND;