add platformProcs() porting function



git-svn-id: http://skia.googlecode.com/svn/trunk@301 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkBitmapProcState.cpp b/src/core/SkBitmapProcState.cpp
index e326165..3e5b927 100644
--- a/src/core/SkBitmapProcState.cpp
+++ b/src/core/SkBitmapProcState.cpp
@@ -506,6 +506,9 @@
             fShaderProc16 = Repeat_S16_D16_filter_DX_shaderproc;
         }
     }
+
+    // see if our platform has any accelerated overrides
+    this->platformProcs();
     return true;
 }