[gjs] jsapi-util: Pass NULL vp array if no ARGV elements

[Philip Chimento <pchimento src gnome org>]

commit 97298dafa99fc9db7e4d16e20709cbd10c9c6022
Author: Philip Chimento <philip chimento gmail com>
Date:   Fri Nov 18 21:46:52 2016 -0800

    jsapi-util: Pass NULL vp array if no ARGV elements
    
    This used to work with an unrooted JS::Value* vp array, but now that we
    are using JS::AutoValueVector we can't index argv[0] if the size of the
    vector is 0. Pass NULL instead.
    
    (Unreviewed, but it's another instance of the same fix as [e329af899].)

 gjs/jsapi-util.cpp |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gjs/jsapi-util.cpp b/gjs/jsapi-util.cpp
index 81f97b9..f68440a 100644
--- a/gjs/jsapi-util.cpp
+++ b/gjs/jsapi-util.cpp
@@ -316,7 +316,8 @@ gjs_build_string_array(JSContext   *context,
         elems.append(element);
     }
 
-    return JS_NewArrayObject(context, elems.length(), &elems[0]);
+    return JS_NewArrayObject(context, elems.length(),
+                             elems.length() ? &elems[0] : NULL);
 }
 
 JSObject*