Add prelim error check for pointers in structs.

Bug: 2954471
Change-Id: Icacf67dd3eeb3dda67e1eae3d54e11f7efa6c680
diff --git a/slang_rs_context.h b/slang_rs_context.h
index e02ff50..5490c93 100644
--- a/slang_rs_context.h
+++ b/slang_rs_context.h
@@ -109,7 +109,7 @@
     return;
   }
 
-  void processExport();
+  bool processExport();
   inline void newExportable(RSExportable *E) {
     if (E != NULL)
       mExportables.push_back(E);