patch 8.2.4877: MS-Windows: Wrongly using Normal colors for termguicolors

Problem:    MS-Windows: Using Normal colors for termguicolors causes problems.
Solution:   Do not use Normal colors to set sg_gui_fg and sg_gui_bg.
            (Christian Brabandt, closes #10317, closes #10241)

src/highlight.c

@@ -3283,27 +3283,6 @@ set_hl_attr(
 	at_en.ae_u.cterm.bg_color = sgp->sg_cterm_bg;
 	at_en.ae_u.cterm.ul_color = sgp->sg_cterm_ul;
 # ifdef FEAT_TERMGUICOLORS
-#  ifdef MSWIN
-#   ifdef VIMDLL
-	// Only when not using the GUI.
-	if (!gui.in_use && !gui.starting)
-#   endif
-	{
-	    int id;
-	    guicolor_T fg, bg;
-
-	    id = syn_name2id((char_u *)"Normal");
-	    if (id > 0)
-	    {
-		syn_id2colors(id, &fg, &bg);
-		if (sgp->sg_gui_fg == INVALCOLOR)
-		    sgp->sg_gui_fg = fg;
-		if (sgp->sg_gui_bg == INVALCOLOR)
-		    sgp->sg_gui_bg = bg;
-	    }
-
-	}
-#  endif
 	at_en.ae_u.cterm.fg_rgb = GUI_MCH_GET_RGB2(sgp->sg_gui_fg);
 	at_en.ae_u.cterm.bg_rgb = GUI_MCH_GET_RGB2(sgp->sg_gui_bg);
 	// Only use the underline/undercurl color when used, it may clear the

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4877,
 /**/
     4876,
 /**/