pdfviewer: fix condition for element in array, reset back the default color to white, and verify ty…

experimental/PdfViewer/pdf_viewer_main.cpp

Index: experimental/PdfViewer/pdf_viewer_main.cpp
===================================================================
--- experimental/PdfViewer/pdf_viewer_main.cpp	(revision 10402)
+++ experimental/PdfViewer/pdf_viewer_main.cpp	(working copy)
@@ -139,7 +139,7 @@
                                                    PNG_FILE_EXTENSION);
 }
 
-static void setup_bitmap(SkBitmap* bitmap, int width, int height, SkColor color = SK_ColorTRANSPARENT) {
+static void setup_bitmap(SkBitmap* bitmap, int width, int height, SkColor color = SK_ColorWHITE) {
     bitmap->setConfig(SkBitmap::kARGB_8888_Config, width, height);
 
     bitmap->allocPixels();