Store the original GDI palette functions in pfnSelectPalette and
pfnRealizePalette so that USER doesn't have to import them.

diff --git a/objects/palette.c b/objects/palette.c
index 238e7ad..0ba7472 100644
--- a/objects/palette.c
+++ b/objects/palette.c
@@ -53,8 +53,8 @@
 
 /* Pointers to USER implementation of SelectPalette/RealizePalette */
 /* they will be patched by USER on startup */
-HPALETTE (WINAPI *pfnSelectPalette)(HDC hdc, HPALETTE hpal, WORD bkgnd ) = NULL;
-UINT (WINAPI *pfnRealizePalette)(HDC hdc) = NULL;
+HPALETTE (WINAPI *pfnSelectPalette)(HDC hdc, HPALETTE hpal, WORD bkgnd ) = GDISelectPalette;
+UINT (WINAPI *pfnRealizePalette)(HDC hdc) = GDIRealizePalette;
 
 static UINT SystemPaletteUse = SYSPAL_STATIC;  /* currently not considered */