Fix minor C++ api issues.

Change-Id: I30e12938be5da52b2d952db57a51b4deb5e27239
diff --git a/ScriptC.h b/ScriptC.h
index dcbbe10..b68f61c 100644
--- a/ScriptC.h
+++ b/ScriptC.h
@@ -25,7 +25,7 @@
 class ScriptC : public Script {
 protected:
     ScriptC(RenderScript *rs,
-            const char *codeTxt, size_t codeLength,
+            const void *codeTxt, size_t codeLength,
             const char *cachedName, size_t cachedNameLength,
             const char *cacheDir, size_t cacheDirLength);