Fix a bunch of Coverity defects - class members not initialized in the constructor.

CID=14533,14036,9275,9271,4156,4153,4151,1666,1665,1618,1617,1616,1615

Review URL: https://codereview.appspot.com/5940049

git-svn-id: http://skia.googlecode.com/svn/trunk@3532 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index 10c5c44..ab16218 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -31,7 +31,8 @@
 #define DEBUG_INVAL_START_IDX -1
 
 GrGpu::GrGpu()
-    : fContext(NULL)
+    : fClipInStencil(false)
+    , fContext(NULL)
     , fResetTimestamp(kExpiredTimestamp+1)
     , fVertexPool(NULL)
     , fIndexPool(NULL)