cmd/compile/internal/gc: gofmt

Commit 36a80c59 introduced formatting errors.

Change-Id: I6d5b231200cd7abcd5b94c1a3f4e99f10ee11c4f
Reviewed-on: https://go-review.googlesource.com/23513Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>

src/cmd/compile/internal/gc/dcl.go

@@ -672,7 +672,6 @@ func funcargs2(t *Type) {
 var funcstack []*Node // stack of previous values of Curfn
 var Funcdepth int32   // len(funcstack) during parsing, but then forced to be the same later during compilation
 
-
 // start the function.
 // called before funcargs; undone at end of funcbody.
 func funcstart(n *Node) {