[0.4.9][SHELL32_WINETEST] Fix 2 MSVC warnings about flags CORE-7538

Can be observed when building with MSVC2010SP1 x86-target in dbg config:
- "...\ebrowser.c(1188) : warning C4133: 'function' : incompatible types - from 'DWORD *' to 'EXPLORER_BROWSER_OPTIONS *'"
- "...\ebrowser.c(1198) : warning C4133: 'function' : incompatible types - from 'DWORD *' to 'EXPLORER_BROWSER_OPTIONS *'"

Cherry-pick 535f2f9e66

fix picked from:
0.4.10-dev-513-g 669d6b445b

modules/rostests/winetests/shell32/ebrowser.c

@@ -1102,7 +1102,7 @@ static void test_basics(void)
     IShellBrowser *psb;
     FOLDERSETTINGS fs;
     ULONG lres;
-    DWORD flags;
+    EXPLORER_BROWSER_OPTIONS flags;
     HDWP hdwp;
     RECT rc;
     HRESULT hr;