jscript: Pass global object as this if 'this' argument is null or undefined in Function.apply.

dlls/jscript/function.c

@@ -403,9 +403,13 @@ static HRESULT Function_apply(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DI
 
     argc = arg_cnt(dp);
     if(argc) {
-        hres = to_object(ctx, get_arg(dp,0), &this_obj);
-        if(FAILED(hres))
-            return hres;
+        VARIANT *v = get_arg(dp,0);
+
+        if(V_VT(v) != VT_EMPTY && V_VT(v) != VT_NULL) {
+            hres = to_object(ctx, v, &this_obj);
+            if(FAILED(hres))
+                return hres;
+        }
     }
 
     if(argc >= 2) {
@@ -413,8 +417,8 @@ static HRESULT Function_apply(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DI
 
         if(V_VT(get_arg(dp,1)) == VT_DISPATCH) {
             arg_array = iface_to_jsdisp((IUnknown*)V_DISPATCH(get_arg(dp,1)));
-            if(arg_array && (
-                !is_class(arg_array, JSCLASS_ARRAY) && !is_class(arg_array, JSCLASS_ARGUMENTS) )) {
+            if(arg_array &&
+               (!is_class(arg_array, JSCLASS_ARRAY) && !is_class(arg_array, JSCLASS_ARGUMENTS) )) {
                 jsdisp_release(arg_array);
                 arg_array = NULL;
             }

dlls/jscript/tests/api.js

@@ -1402,6 +1402,9 @@ function callTest3() {
 callTest3.call();
 callTest3.call(undefined);
 callTest3.call(null);
+callTest3.apply();
+callTest3.apply(undefined);
+callTest3.apply(null);
 
 tmp = Number.prototype.toString.call(3);
 ok(tmp === "3", "Number.prototype.toString.call(3) = " + tmp);