VGA: On any mode change, refresh the VGA color palette. For some reason, the mode change code corrupts the color palette as rendered to screen. This fixes Crystal Dream II palette errors.

CHANGELOG

@@ -1,4 +1,5 @@
 (next)
+  - VGA palette errors with Crystal Dream II fixed.
   - PC-98 FM synthesis fixed not to initialize itself
     again when rebooting, which fixes a problem with
     garbled FM synthesis after rebooting.

src/hardware/vga_draw.cpp

@@ -2702,10 +2702,12 @@ void VGA_SetupDrawing(Bitu /*val*/) {
 			vga_fps = fps;
 			VGA_VerticalTimer(0);
 		}
-
-		VGA_DAC_UpdateColorPalette();
 	}
 	vga.draw.delay.singleline_delay = (float)vga.draw.delay.htotal;
+
+    /* FIXME: Why is this required to prevent VGA palette errors with Crystal Dream II?
+     *        What is this code doing to change the palette prior to this point? */
+    VGA_DAC_UpdateColorPalette();
 }
 
 void VGA_KillDrawing(void) {