(svn r7460) -Fix (r7337): [win32] If the underlying OS didn't have support for SHGetFolderPath the

application failed to run. Now test if the function exists and if not try a different
 approach using our own OTTDSHGetFolderPath wrapper.

win32.h

@@ -3,6 +3,7 @@
 #ifndef WIN32_H
 #define WIN32_H
 
+#include <windows.h>
 bool MyShowCursor(bool show);
 
 typedef void (*Function)(int);
@@ -23,6 +24,14 @@ wchar_t *convert_to_fs(const char *name, wchar_t *utf16_buf, size_t buflen);
 # define WIDE_TO_MB_BUFFER(str, buffer, buflen) (str)
 #endif
 
+/* Override SHGetFolderPath with our custom implementation */
+#if defined(SHGetFolderPath)
+#undef SHGetFolderPath
+#endif
+#define SHGetFolderPath OTTDSHGetFolderPath
+
+HRESULT OTTDSHGetFolderPath(HWND, int, HANDLE, DWORD, LPTSTR);
+
 #if defined(__MINGW32__)
 #define SHGFP_TYPE_CURRENT 0
 #endif /* __MINGW32__ */