patch 8.2.3653: terminal ANSI colors may be wrong

Problem:    Terminal ANSI colors may be wrong.
Solution:   Initialize the color type. (closes #9198, closes #9197)
diff --git a/src/terminal.c b/src/terminal.c
index f6c283b..df1ca69 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -4130,6 +4130,7 @@
     {
 	VTermColor	color;
 
+	color.type = VTERM_COLOR_RGB;
 	color.red = (unsigned)(rgb[index] >> 16);
 	color.green = (unsigned)(rgb[index] >> 8) & 255;
 	color.blue = (unsigned)rgb[index] & 255;