Grab-bag of memory fixes

SkFlatMatrix::Flatten had the same issue as Sk2DPathEffect:  it was encoding a partially-unintialized matrix type mask.  The others are simply uninitialized vars in the sample code.

[Stephen White, 2011-05-24 18:59:12]

ping?

[reed1, 2011-05-24 19:31:21]

http://codereview.appspot.com/4539072/diff/1/src/core/SkPictureFlat.cpp
File src/core/SkPictureFlat.cpp (right):

http://codereview.appspot.com/4539072/diff/1/src/core/SkPictureFlat.cpp#newco...
src/core/SkPictureFlat.cpp:35: buffer.flatten(result->fMatrixData);
I think we can avoid the overhead of a tmp buffer:

size_t size = matrix.flatten(NULL);
SkFlatMatrix* result = ...
matrix.flatten(&result->fMatrixData);

[Stephen White, 2011-05-24 20:16:34]

Responding to Mike's comments

[reed1, 2011-05-24 20:19:40]

LGTM

[Stephen White, 2011-05-24 20:30:12]

Landed as r1414.  Closing.