call readyToDraw() instead of just checking for null pixels, since we could

have a bitmap with pixels, but no (required) colortable. readyToDraw() knows
to check for this.



git-svn-id: http://skia.googlecode.com/svn/trunk@599 2bbb7eff-a529-9590-31e7-b0007b416f81

src/core/SkBitmapProcShader.cpp

@@ -82,7 +82,7 @@ bool SkBitmapProcShader::setContext(const SkBitmap& device,
 
     fState.fOrigBitmap = fRawBitmap;
     fState.fOrigBitmap.lockPixels();
-    if (fState.fOrigBitmap.getPixels() == NULL) {
+    if (!fState.fOrigBitmap.readyToDraw()) {
         fState.fOrigBitmap.unlockPixels();
         return false;
     }