Make SkShader store localM directly rather than as a separate alloc.

May cause very slight GM changes in gpu two pt radial/conical radients.
Review URL: https://codereview.appspot.com/6821056

git-svn-id: http://skia.googlecode.com/svn/trunk@6221 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pdf/SkPDFShader.cpp b/src/pdf/SkPDFShader.cpp
index ace93ea..db5beb8 100644
--- a/src/pdf/SkPDFShader.cpp
+++ b/src/pdf/SkPDFShader.cpp
@@ -937,7 +937,7 @@
     fInfo.fColorCount = 0;
     fInfo.fColors = NULL;
     fInfo.fColorOffsets = NULL;
-    shader.getLocalMatrix(&fShaderTransform);
+    fShaderTransform = shader.getLocalMatrix();
     fImageTileModes[0] = fImageTileModes[1] = SkShader::kClamp_TileMode;
 
     fType = shader.asAGradient(&fInfo);