Fix safe for mp check in ScriptC.

Change-Id: Id91b3c1e99b2705fd39f9e74a52c61110805e246
diff --git a/libs/rs/rsContext.h b/libs/rs/rsContext.h
index bce9c13..b85d2a8 100644
--- a/libs/rs/rsContext.h
+++ b/libs/rs/rsContext.h
@@ -174,7 +174,7 @@
     uint32_t getMaxVertexUniformVectors() const {return mGL.mMaxVertexUniformVectors;}
 
     void launchThreads(WorkerCallback_t cbk, void *data);
-    uint32_t getWorkerPoolSize() const {return (uint32_t)mWorkers.mRunningCount;}
+    uint32_t getWorkerPoolSize() const {return (uint32_t)mWorkers.mCount;}
 
 protected:
     Device *mDev;