Fixing fragment shader bounding code

Change-Id: I743dae12bb3f226f758a065d9b353eff36e2f964
diff --git a/rsProgramFragment.h b/rsProgramFragment.h
index 7c1598e..f08bb25 100644
--- a/rsProgramFragment.h
+++ b/rsProgramFragment.h
@@ -57,6 +57,7 @@
 
     float mConstantColor[4];
     int32_t mConstantColorUniformIndex;
+    int32_t mTextureUniformIndexStart;
 };
 
 class ProgramFragmentState