Skip lead image finder when no text content

java/org/chromium/distiller/webdocument/filters/LeadImageFinder.java

Index: java/org/chromium/distiller/webdocument/filters/LeadImageFinder.java
diff --git a/java/org/chromium/distiller/webdocument/filters/LeadImageFinder.java b/java/org/chromium/distiller/webdocument/filters/LeadImageFinder.java
index 86d840e1293417940939d885456f9afb5362610f..b6d7345c089ac60241589f3d6ef113fb67408032 100644
--- a/java/org/chromium/distiller/webdocument/filters/LeadImageFinder.java
+++ b/java/org/chromium/distiller/webdocument/filters/LeadImageFinder.java
@@ -47,6 +47,8 @@ public class LeadImageFinder {
             }
             lastContent = (WebText) e;
         }
+        if (lastContent == null) return false;
+
         boolean isWebImage;
         for (WebElement e : w.getElements()) {
             // If the element is an image and not already