gc: two bug fixes.

test/fixedbugs/bug216.go

Index: test/fixedbugs/bug216.go
===================================================================
new file mode 100644
--- /dev/null
+++ b/test/fixedbugs/bug216.go
@@ -0,0 +1,20 @@
+// $G $D/$F.go || echo BUG: bug216
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Used to be rejected
+// http://code.google.com/p/go/issues/detail?id=188
+
+package main
+
+func complexSqrt(i int) (int, int)	{ return 0, 1 }
+
+var re, im = complexSqrt(-1)
+
+func main() {
+	if re != 0 || im != 1 {
+		println("BUG: bug216: want 0,-1 have ", re, im)
+	}
+}