keystore: CryptUnprotectData is officially found in dpapi.h

In MS SDKs and in mingw64

(cherry picked from commit f6f0f27557)
Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>

modules/keystore/file_crypt_win32.c

@@ -26,7 +26,7 @@
 #include "file_crypt.h"
 
 #include <windows.h>
-#include <wincrypt.h>
+#include <dpapi.h>
 
 typedef BOOL (WINAPI *ProcessFunc)(DATA_BLOB*, LPCWSTR, DATA_BLOB*, PVOID,
                                    CRYPTPROTECT_PROMPTSTRUCT*, DWORD, DATA_BLOB*);