pdfviewer: fix typo (false != NULL)

Review URL: https://codereview.chromium.org/19543016

git-svn-id: http://skia.googlecode.com/svn/trunk@10235 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/PdfViewer/pdfparser/native/SkPdfObject.h b/experimental/PdfViewer/pdfparser/native/SkPdfObject.h
index e1cdb42..ff64798 100644
--- a/experimental/PdfViewer/pdfparser/native/SkPdfObject.h
+++ b/experimental/PdfViewer/pdfparser/native/SkPdfObject.h
@@ -404,7 +404,7 @@
 
         if (key->fObjectType != kName_PdfObjectType || fObjectType != kDictionary_PdfObjectType) {
             // TODO(edisonn): report err
-            return false;
+            return NULL;
         }
 
         SkASSERT(key->fStr.fBuffer[key->fStr.fBytes] == '\0');
@@ -430,7 +430,7 @@
 
         if (key->fObjectType != kName_PdfObjectType || fObjectType != kDictionary_PdfObjectType) {
             // TODO(edisonn): report err
-            return false;
+            return NULL;
         }
 
         SkASSERT(key->fStr.fBuffer[key->fStr.fBytes] == '\0');