Silence warning after f5e315ccf1a.

Silence warning after f5e315ccf1a.

(clang 3.3):

../tools/PictureRenderer.cpp:350:13: error: variable 'hash' is used uninitialized whenever 'if' condition is false
      [-Werror,-Wsometimes-uninitialized]
        if (!generatedHash) {
            ^~~~~~~~~~~~~~
../tools/PictureRenderer.cpp:354:53: note: uninitialized use occurs here
        jsonSummaryPtr->add(outputFilename.c_str(), hash);
                                                    ^~~~
../tools/PictureRenderer.cpp:350:9: note: remove the 'if' if its condition is always true
        if (!generatedHash) {
        ^~~~~~~~~~~~~~~~~~~~
../tools/PictureRenderer.cpp:334:18: note: initialize the variable 'hash' to silence this warning
    uint64_t hash;
                 ^
                  = 0

The warning is wrong, but the compiler does have a point: generatedHash is always false at that point.

R=epoger@google.com

Committed: http://code.google.com/p/skia/source/detail?r=13869

[epoger, 2014-03-19 22:08:58]

LGTM

Thanks!

[f(malita), 2014-03-19 22:33:51]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2014-03-19 22:33:57]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/fmalita@chromium.org/196823004/20001

[commit-bot: I haz the power, 2014-03-19 22:58:54]

Change committed as 13869