Fix a few clang errors while trying to build tools target.

Most of the errors were like:
../../src/gpu/gl/GrGLEffectMatrix.cpp:74:9: error: variable 'varyingType' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
../../src/gpu/gl/debug/GrDebugGL.h:125:21: error: private field 'fMaxTextureUnits' is not used [-Werror,-Wunused-private-field]
../../src/core/SkBitmapSampler.cpp:312:25: error: private field 'fProcTable' is not used [-Werror,-Wunused-private-field]

R=bsalomon@google.com,scroggo@google.com

Review URL: https://codereview.chromium.org/12915007

git-svn-id: http://skia.googlecode.com/svn/trunk/include@8403 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed