text/template: fix type of ComplexZero in test
Was stupidly float64; should be complex128.
The tests still pass.

Fixes #5649.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12107044
diff --git a/src/pkg/text/template/exec_test.go b/src/pkg/text/template/exec_test.go
index 0ab20ac..b898565 100644
--- a/src/pkg/text/template/exec_test.go
+++ b/src/pkg/text/template/exec_test.go
@@ -24,7 +24,7 @@
 	U16         uint16
 	X           string
 	FloatZero   float64
-	ComplexZero float64
+	ComplexZero complex128
 	// Nested structs.
 	U *U
 	// Struct with String method.