runtime,internal/trace: map/slice literals janitoring

Simplify slice/map literal expressions.
Caught with gofmt -d -s, fixed with gofmt -w -s
Checked that the result can still be compiled with Go 1.4.

Change-Id: I06bce110bb5f46ee2f45113681294475aa6968bc
Reviewed-on: https://go-review.googlesource.com/13839
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/src/internal/trace/parser.go b/src/internal/trace/parser.go
index 1eb39dd..11f9aba 100644
--- a/src/internal/trace/parser.go
+++ b/src/internal/trace/parser.go
@@ -479,7 +479,7 @@
 			p.g = ev.G
 			if g.evCreate != nil {
 				// +1 because symbolizer expects return pc.
-				ev.Stk = []*Frame{&Frame{PC: g.evCreate.Args[1] + 1}}
+				ev.Stk = []*Frame{{PC: g.evCreate.Args[1] + 1}}
 				g.evCreate = nil
 			}