suppress uninit warning in rb-tree

git-svn-id: http://skia.googlecode.com/svn/trunk@826 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrRedBlackTree.h b/gpu/src/GrRedBlackTree.h
index 310722a..e6448fb 100644
--- a/gpu/src/GrRedBlackTree.h
+++ b/gpu/src/GrRedBlackTree.h
@@ -358,7 +358,7 @@
     Node* gp = NULL;
     Node* p = NULL;
     Node* n = fRoot;
-    Child pc;
+    Child pc = kLeft_Child; // suppress uninit warning
     Child gpc;
 
     bool first = true;