Skip font size/weight for top element

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -379,6 +379,7 @@ public class HtmlHelper {
 
                             case "font-size":
                                 // https://developer.mozilla.org/en-US/docs/Web/CSS/font-size
+                                if (element.parent() != null) {
                                     Float fsize = getFontSize(value);
                                     if (fsize != null && fsize != 0 &&
                                             (fsize <= 0.8f || fsize >= 1.25)) {
@@ -386,16 +387,19 @@ public class HtmlHelper {
                                         element.replaceWith(e);
                                         e.appendChild(element);
                                     }
+                                }
                                 break;
 
                             case "font-weight":
                                 // https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight
+                                if (element.parent() != null) {
                                     Integer fweight = getFontWeight(value);
                                     if (fweight != null && fweight >= 600) {
                                         Element strong = new Element("strong");
                                         element.replaceWith(strong);
                                         strong.appendChild(element);
                                     }
+                                }
                                 break;
 
                             case "text-decoration":