hush: fix handling of words with braces. +65 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush_test/hush-parsing/brace1.tests b/shell/hush_test/hush-parsing/brace1.tests
new file mode 100755
index 0000000..2b45927
--- /dev/null
+++ b/shell/hush_test/hush-parsing/brace1.tests
@@ -0,0 +1,7 @@
+echo {abc}
+echo {
+echo }
+{cmd
+""{
+{""
+echo Done: $?