hush: fix handling of raw ^C in scripts: "echo ^C"

function                                             old     new   delta
expand_vars_to_list                                 1133    1187     +54
parse_stream                                        2690    2719     +29

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush_test/hush-misc/control_char1.right b/shell/hush_test/hush-misc/control_char1.right
new file mode 100644
index 0000000..9498b42
--- /dev/null
+++ b/shell/hush_test/hush-misc/control_char1.right
@@ -0,0 +1,2 @@
+
+Done:0
diff --git a/shell/hush_test/hush-misc/control_char1.tests b/shell/hush_test/hush-misc/control_char1.tests
new file mode 100755
index 0000000..a2ebeba
--- /dev/null
+++ b/shell/hush_test/hush-misc/control_char1.tests
@@ -0,0 +1,2 @@
+echo 
+echo Done:$?