jscript: Inherit Math from Object.

dlls/jscript/math.c

@@ -602,5 +602,19 @@ static const builtin_info_t Math_info = {
 
 HRESULT create_math(script_ctx_t *ctx, DispatchEx **ret)
 {
-    return create_dispex(ctx, &Math_info, NULL, ret);
+    DispatchEx *math;
+    HRESULT hres;
+
+    math = heap_alloc_zero(sizeof(DispatchEx));
+    if(!math)
+        return E_OUTOFMEMORY;
+
+    hres = init_dispex_from_constr(math, ctx, &Math_info, ctx->object_constr);
+    if(FAILED(hres)) {
+        heap_free(math);
+        return hres;
+    }
+
+    *ret = math;
+    return S_OK;
 }

dlls/jscript/tests/api.js

@@ -1394,5 +1394,6 @@ testObjectInherit(new Boolean(true), false, true, false);
 testObjectInherit(new Array(), false, false, true);
 testObjectInherit(new Error(), false, true, true);
 testObjectInherit(testObjectInherit, false, true, true);
+testObjectInherit(Math, true, true, true);
 
 reportSuccess();