cmd/cloner: fix found type detection

This was causing any type to be reported as found,
as long as there were any type decls at all. Oops.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>

cmd/cloner/cloner.go

@@ -86,10 +86,10 @@ func main() {
 					}
 					pkg := typeNameObj.Pkg()
 					gen(buf, imports, typeName, typ, pkg)
-				}
 					found = true
 				}
 			}
+		}
 		if !found {
 			log.Fatalf("could not find type %s", typeName)
 		}