jscript: Properly handle NULL pvarResult in ParseScriptText.

dlls/jscript/jscript.c

@@ -783,7 +783,8 @@ static HRESULT WINAPI JScriptParse_ParseScriptText(IActiveScriptParse *iface,
             clear_ei(This->ctx);
             hres = exec_source(exec_ctx, code, &code->global_code, TRUE, &r);
             if(SUCCEEDED(hres)) {
-                hres = jsval_to_variant(r, pvarResult);
+                if(pvarResult)
+                    hres = jsval_to_variant(r, pvarResult);
                 jsval_release(r);
             }
             exec_release(exec_ctx);

dlls/jscript/tests/run.c

@@ -1945,6 +1945,13 @@ static void test_script_exprs(void)
     hres = parse_script_expr("reportSuccess(); return true", &v);
     ok(hres == 0x800a03fa, "parse_script_expr failed: %08x\n", hres);
 
+    SET_EXPECT(global_success_d);
+    SET_EXPECT(global_success_i);
+    hres = parse_script_expr("reportSuccess(); true", NULL);
+    ok(hres == S_OK, "parse_script_expr failed: %08x\n", hres);
+    CHECK_CALLED(global_success_d);
+    CHECK_CALLED(global_success_i);
+
     testing_expr = FALSE;
 }