Plumb context through for serialization.

Change-Id: I2a49f57aa7576604deeac898a7cceb36ae68d66f
diff --git a/rsScriptC_LibGL.cpp b/rsScriptC_LibGL.cpp
index 21b1c42..995cef2 100644
--- a/rsScriptC_LibGL.cpp
+++ b/rsScriptC_LibGL.cpp
@@ -251,7 +251,7 @@
                                float *minX, float *minY, float *minZ,
                                float *maxX, float *maxY, float *maxZ) {
     CHECK_OBJ(sm);
-    sm->computeBBox();
+    sm->computeBBox(rsc);
     *minX = sm->mBBoxMin[0];
     *minY = sm->mBBoxMin[1];
     *minZ = sm->mBBoxMin[2];