user32: Add a helper to retrieve the dimensions of an icon.
diff --git a/dlls/user32/user_private.h b/dlls/user32/user_private.h
index 8c49ad3..67fdbb6 100644
--- a/dlls/user32/user_private.h
+++ b/dlls/user32/user_private.h
@@ -328,6 +328,7 @@
 #include "poppack.h"
 
 extern void CURSORICON_FreeModuleIcons( HMODULE16 hModule ) DECLSPEC_HIDDEN;
+extern BOOL get_icon_size( HICON handle, SIZE *size ) DECLSPEC_HIDDEN;
 
 /* Mingw's assert() imports MessageBoxA and gets confused by user32 exporting it */
 #ifdef __MINGW32__