Check lockPixel failure in SkBitmapProcState

src/core/SkBitmapProcState.cpp

Index: src/core/SkBitmapProcState.cpp
===================================================================
--- src/core/SkBitmapProcState.cpp	(revision 11394)
+++ src/core/SkBitmapProcState.cpp	(working copy)
@@ -159,6 +159,9 @@
                                                             fScaledBitmap);
         }
         fScaledBitmap.lockPixels(); // wonder if Resize() should have locked this
+        if (!fScaledBitmap.getPixel()) {
+            return false;
+        }
         fBitmap = &fScaledBitmap;
 
         // set the inv matrix type to translate-only;
@@ -293,6 +296,9 @@
         }
     }
     fScaledBitmap.lockPixels(); // just 'cause the cache made a copy :(
+    if (!fScaledBitmap.getPixel()) {
+        return false;
+    }
     fBitmap = &fScaledBitmap;
     return true;
 }