patch 8.2.2084: CTRL-V U doesn't work to enter a Unicode character

Problem:    CTRL-V U doesn't work to enter a Unicode character when
            modifyOtherKeys is effective. (Ken Takata)
Solution:   Add a flag to get_literal() for the shift key. (closes #7413)
diff --git a/src/normal.c b/src/normal.c
index d90326f..da0ffc1 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -4927,7 +4927,7 @@
     if (cap->nchar == Ctrl_V)
     {
 	had_ctrl_v = Ctrl_V;
-	cap->nchar = get_literal();
+	cap->nchar = get_literal(FALSE);
 	// Don't redo a multibyte character with CTRL-V.
 	if (cap->nchar > DEL)
 	    had_ctrl_v = NUL;
@@ -5208,7 +5208,7 @@
 	else
 	{
 	    if (cap->extra_char == Ctrl_V)	// get another character
-		cap->extra_char = get_literal();
+		cap->extra_char = get_literal(FALSE);
 	    stuffcharReadbuff(cap->extra_char);
 	    stuffcharReadbuff(ESC);
 	    if (virtual_active())