comment_new.go: create page before inserting comment

Fixes https://gitlab.com/commento/commento/issues/173

api/comment_new.go

@@ -30,6 +30,10 @@ func commentNew(commenterHex string, domain string, path string, parentHex strin
 
 	html := markdownToHtml(markdown)
 
+	if err = pageNew(domain, path); err != nil {
+		return "", err
+	}
+
 	statement := `
 		INSERT INTO
 		comments (commentHex, domain, path, commenterHex, parentHex, markdown, html, creationDate, state)
@@ -41,10 +45,6 @@ func commentNew(commenterHex string, domain string, path string, parentHex strin
 		return "", errorInternal
 	}
 
-	if err = pageNew(domain, path); err != nil {
-		return "", err
-	}
-
 	return commentHex, nil
 }