[PATCH v2 2/2] jscript: Fix Array.reduce when last element doesn't exist.

[Gabriel Ivăncescu]

From: Gabriel Ivăncescu

Signed-off-by: Gabriel Ivăncescu 
---
 dlls/jscript/array.c     | 4 +++-
 dlls/mshtml/tests/es5.js | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/jscript/array.c b/dlls/jscript/array.c
index f86a9323aa8..29609526046 100644
--- a/dlls/jscript/array.c
+++ b/dlls/jscript/array.c
@@ -1426,8 +1426,10 @@ static HRESULT Array_reduce(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsign

for(k = 0; k < length; k++) {
         hres = jsdisp_get_idx(jsthis, k, &callback_args[1]);
-        if(hres == DISP_E_UNKNOWNNAME)
+        if(hres == DISP_E_UNKNOWNNAME) {
+            hres = S_OK;
             continue;
+        }
         if(FAILED(hres))
             break;

diff --git a/dlls/mshtml/tests/es5.js b/dlls/mshtml/tests/es5.js
index fbcb1b42f3e..b6ce7be3c54 100644
--- a/dlls/mshtml/tests/es5.js
+++ b/dlls/mshtml/tests/es5.js
@@ -1336,6 +1336,9 @@ sync_test("reduce", function() {
     r = [1,2,3].reduce(function(a, value) { return a + value; }, "str");
     ok(r === "str123", "reduce() returned " + r);

+    r = [1,2,].reduce(function(a, value) { return a + value; }, "str");
+    ok(r === "str12", "reduce() returned " + r);
+
     array = [1,2,3];
     r = array.reduce(function(a, value, index, src) {
         ok(src === array, "src != array");