fix breaking dereference error in gopher fetch funcs

fetch/gopher.go

@@ -33,12 +33,12 @@ func gopherFeed(data *core.FullData, remote string, title string) error {
 	if err != nil {
 		return err
 	}
-	defer resp.Body.Close()
 
 	if len(resp.Dir.Items) != 0 {
 		// TODO
 		return fmt.Errorf("Gemini-style feeds served over gopher are currently unsupported.")
 	}
+	defer resp.Body.Close()
 
 	reader := io.LimitReader(resp.Body, 1073741824) // 1 GiB
 	gofeed, err := gofeed.NewParser().Parse(reader)
@@ -60,7 +60,6 @@ func gopherPage(data *core.FullData, remote string, title string) error {
 	if err != nil {
 		return err
 	}
-	defer resp.Body.Close()
 
 	var reader io.Reader
 	if len(resp.Dir.Items) > 0 {
@@ -70,6 +69,7 @@ func gopherPage(data *core.FullData, remote string, title string) error {
 		}
 		reader = io.LimitReader(bytes.NewReader(text), 1073741824) // 1 GiB
 	} else {
+		defer resp.Body.Close()
 		reader = io.LimitReader(resp.Body, 1073741824) // 1 GiB
 	}