ANSI C fixes.
Removed warnings.
Made the include files self-sufficient.
Some Solaris fixes.

diff --git a/include/psapi.h b/include/psapi.h
index 389bad8..8fedeb1 100644
--- a/include/psapi.h
+++ b/include/psapi.h
@@ -5,6 +5,8 @@
 #ifndef __WINE_PSAPI_H
 #define __WINE_PSAPI_H
 
+#include "windef.h"
+
 typedef struct _MODULEINFO {
   LPVOID lpBaseOfDll;
   DWORD SizeOfImage;